{"title":"Auto Top Off (ATO)","description":"\u003cp\u003eWater evaporates from an aquarium but salt does not, so as the level drops the salinity climbs. An auto top off unit, shortened to ATO, watches the water level and pumps in fresh water from a reservoir to replace what has evaporated, holding salinity steady around the clock.\u003c\/p\u003e\n\u003cp\u003eIt is one of the highest value pieces of automation on a marine tank, particularly a smaller one, where a day of hot weather can move salinity enough to stress corals and invertebrates.\u003c\/p\u003e\n\u003cp\u003eWe stock AutoAqua and Red Sea units with optical and float sensors, most with a failsafe second sensor and a pump timeout so a stuck sensor cannot flood the tank. Top up with RO\/DI water rather than tap water, or you will concentrate whatever is in your tap supply.\u003c\/p\u003e\n\u003cp\u003eSee \u003ca href=\"\/collections\/sw-ro-di-water-filtration\"\u003eRO\/DI Water Filtration\u003c\/a\u003e. Shipped Australia wide from Brisbane.\u003c\/p\u003e","products":[{"product_id":"red-sea-reefer-ato-upgrade-kit-no-corner-bracket","title":"Red Sea Reefer ATO Upgrade Kit (No Corner Bracket)","description":"\u003cp\u003e\u003cstrong\u003eRed Sea's 3-in-1 ReefATO+ system, supplied without the corner mounting bracket.\u003c\/strong\u003e This upgrade kit brings automatic top-off, conductivity-based salinity monitoring and a built-in leak detector to a Reefer aquarium in one Smart Hardware unit, run from Red Sea's ReefBeat app. This listing is the version without the magnetic corner bracket — the right choice if you already have one fitted from an earlier Red Sea kit or a compatible mounting point in your sump.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e3-in-1 sensing\u003c\/strong\u003e — one probe assembly measures water level for top-off, electrical conductivity for salinity, and doubles as a leak detector, all on titanium probes rated for reef water.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in digital thermometer\u003c\/strong\u003e — accurate to ±0.1°C, so you get a live temperature reading alongside level and salinity.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-flow 12 V DC pump\u003c\/strong\u003e — 6–10 W, up to 300 L\/h with a 2.5 m maximum head, so it can reach a top-off reservoir that isn't sitting right beside the sump.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReefBeat app control\u003c\/strong\u003e — the Smart Controller connects to Red Sea's app for monitoring and alerts, rather than a standalone dial-and-button unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state conductivity sensing\u003c\/strong\u003e — no float switch to stick or foul with coralline growth.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's included\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eWater-level and conductivity sensor with titanium probes\u003c\/li\u003e\n\u003cli\u003eBuilt-in digital thermometer\u003c\/li\u003e\n\u003cli\u003eTitanium-probe leak detector\u003c\/li\u003e\n\u003cli\u003e12 V DC variable-flow ATO pump — 6–10 W, up to 300 L\/h, 2.5 m maximum head\u003c\/li\u003e\n\u003cli\u003eSmart Controller with ReefBeat app connectivity\u003c\/li\u003e\n\u003cli\u003e3 m of silicone tubing, tube holder\/clips and a siphon breaker\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat you'll still need\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eA corner mounting bracket\u003c\/strong\u003e — this kit is supplied without one. If you don't already have a Red Sea bracket fitted, add one to your order to mount the sensor at the sump corner.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA top-off reservoir\u003c\/strong\u003e — the kit has no dedicated tank of its own. The pump is sized to sit inside your existing reservoir, jerrycan or the Reefer cabinet's built-in top-off compartment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRO\/DI top-off water\u003c\/strong\u003e — top off with RO\/DI only. Topping off with saltwater raises salinity over time, because salt doesn't evaporate with the water.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eAttribute\u003c\/th\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSensing\u003c\/td\u003e\n\u003ctd\u003eWater level, conductivity (salinity), leak detection, temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProbe material\u003c\/td\u003e\n\u003ctd\u003eTitanium\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eThermometer accuracy\u003c\/td\u003e\n\u003ctd\u003e±0.1°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump voltage \/ power\u003c\/td\u003e\n\u003ctd\u003e12 V DC, 6–10 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePump flow\u003c\/td\u003e\n\u003ctd\u003eVariable, up to 300 L\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum head\u003c\/td\u003e\n\u003ctd\u003e2.5 m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl\u003c\/td\u003e\n\u003ctd\u003eSmart Controller, ReefBeat app\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTubing supplied\u003c\/td\u003e\n\u003ctd\u003e3 m silicone, 5 mm internal diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCorner bracket\u003c\/td\u003e\n\u003ctd\u003eNot included in this listing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for:\u003c\/strong\u003e existing Red Sea Reefer owners adding or replacing ATO functionality, and anyone who already has a Red Sea corner bracket fitted.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for:\u003c\/strong\u003e a first-time buyer who also needs the bracket — check what you have before ordering this version, or ask us to add a bracket to your order.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSetting up\u003c\/h3\u003e\u003cp\u003eThe sensor mounts at a sump corner on the bracket, the pump sits in your reservoir, and the 3 m tubing runs from pump to top-off point. The Smart Controller pairs with the ReefBeat app for monitoring and alerts, and — on compatible Red Sea controllers — integration with the rest of a ReefBeat system.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by Red Sea's manufacturer warranty against defects, in addition to your rights under Australian Consumer Law. Standard parcel delivery Australia-wide.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eDo I need the corner bracket separately?\u003c\/h4\u003e\u003cp\u003eIf you don't already have one fitted from a previous Red Sea kit, yes — this listing doesn't include it. Ask us before ordering and we can add the bracket to your order.\u003c\/p\u003e\u003ch4\u003eDoes it come with its own reservoir?\u003c\/h4\u003e\u003cp\u003eNo. The pump is designed to sit in an existing top-off reservoir, jerrycan or your Reefer cabinet's built-in top-off compartment.\u003c\/p\u003e\u003ch4\u003eWhat water should I use to top off?\u003c\/h4\u003e\u003cp\u003eRO\/DI water only. Topping off with saltwater will raise your tank's salinity over time, because salt is left behind when water evaporates.\u003c\/p\u003e\u003ch4\u003eWill this work with any Reefer system?\u003c\/h4\u003e\u003cp\u003eIt's designed as an upgrade for Red Sea Reefer aquariums generally. If you're not sure it will mount cleanly on your specific model and generation, ask us before ordering.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774162719011,"sku":"RED902","price":503.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-reefer-ato-upgrade-k-10135207903523-1-dq.webp?v=1790372839"},{"product_id":"reefsense-ato-sensor","title":"ReefSense ATO Sensor","description":"\u003cp\u003e\u003cstrong\u003eTells your top-up system exactly when to run — and when to stop.\u003c\/strong\u003e The Red Sea ReefSense ATO Sensor is a solid-state, titanium-probe water-level sensor that connects directly to a ReefControl Lite or ReefControl Pro hub, giving your auto top-off system a reliable trigger point without a mechanical float to stick or foul with coralline growth. It mounts magnetically to the outside of the glass and reports the level straight into the ReefBeat app alongside your other ReefSense readings.\u003c\/p\u003e\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state, titanium-probe sensing\u003c\/strong\u003e — uses electrical-conductivity detection rather than a moving float, so there's nothing mechanical to jam or wear out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic mount\u003c\/strong\u003e — fits glass up to 12 mm (½\") thick, no drilling or glue.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in temperature sensor\u003c\/strong\u003e — accurate to ±0.1°C, reported alongside the level in the ReefBeat app.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePlugs straight into ReefControl\u003c\/strong\u003e — works with ReefControl Lite or Pro, and can interface with a ReefControl Power unit to switch a top-up pump or an alarm.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSensing technology\u003c\/th\u003e\n\u003ctd\u003eSolid-state, titanium-probe electrical-conductivity (EC) water-level sensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMounting\u003c\/th\u003e\n\u003ctd\u003eMagnetic bracket, fits glass up to 12 mm (½\") thick\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBuilt-in temperature accuracy\u003c\/th\u003e\n\u003ctd\u003e±0.1°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eConnects to\u003c\/th\u003e\n\u003ctd\u003eReefControl Lite or ReefControl Pro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhat's included \/ what you'll still need\u003c\/h3\u003e\u003cp\u003eThis listing is for the ReefSense ATO Sensor itself — the titanium probe and mounting bracket. It does not include a top-up dosing pump, reservoir or tubing, or a ReefControl hub; you'll need a ReefControl Lite or Pro to read the sensor, and a separate pump (switched through ReefControl Power, or your existing ATO pump) to act on it.\u003c\/p\u003e\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\u003cp\u003eSuitable for fresh or marine tanks already running, or about to run, ReefControl Lite or Pro. Not suitable as a stand-alone ATO system — it's the level sensor, not the pump that does the topping up.\u003c\/p\u003e\u003ch3\u003eSafety\u003c\/h3\u003e\u003cp\u003eRed Sea has not published a specific run-dry or overfill fail-safe behaviour for this sensor on its Australian or global product pages at the time of writing. Check your ATO reservoir manually until you're confident the system is behaving as expected, and never leave a top-up pump running unattended and unchecked for the first few days after setup.\u003c\/p\u003e\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\u003cp\u003eCovered by Red Sea's manufacturer warranty, in addition to your consumer guarantee rights under Australian Consumer Law. Ships as a small parcel item at standard rates.\u003c\/p\u003e\u003ch3\u003eCommon questions\u003c\/h3\u003e\u003ch4\u003eIs this an optical sensor?\u003c\/h4\u003e\u003cp\u003eNo — it's a solid-state sensor using a titanium probe and electrical-conductivity detection, not an optical or float-based system.\u003c\/p\u003e\u003ch4\u003eDoes it come with a pump?\u003c\/h4\u003e\u003cp\u003eNo, this listing is the sensor and mounting bracket only. A separate top-up pump is needed to complete an ATO system.\u003c\/p\u003e\u003ch4\u003eWhat hub does it need?\u003c\/h4\u003e\u003cp\u003eA ReefControl Lite or ReefControl Pro to read and act on the sensor's data.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":55242223780131,"sku":"BA9035","price":130.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/reefsense-ato-sensor-43138106130723.webp?v=1790230923"},{"product_id":"reefcontrol-ato-module","title":"ReefControl ATO Module","description":"\u003cp\u003e\u003cstrong\u003eFail-safe auto top-off, built into your controller.\u003c\/strong\u003e The Red Sea ReefControl ATO Module adds a complete automatic top-off system to a ReefControl Lite or Pro controller, without a separate standalone ATO unit to plumb and program. It suits anyone already running ReefControl who wants top-off, temperature logging and overfill protection managed from the same app and hardware as their other probes.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state digital sensor\u003c\/strong\u003e — titanium probe with no moving parts, reporting water level and temperature to ±0.1°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVariable-flow 12V DC pump\u003c\/strong\u003e — up to 300 L\/h (75 GPH) at zero head, 2.5m (8') maximum lift.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFail-safe logic\u003c\/strong\u003e — shuts the pump down automatically if the sensor disconnects, the pump runs abnormally long, or the RO reservoir runs dry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnetic mounting bracket included\u003c\/strong\u003e — fits glass up to roughly 12mm thick.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo standalone controller needed\u003c\/strong\u003e — runs entirely through the ReefControl Lite or Pro you already own.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePump power\u003c\/th\u003e\n\u003ctd\u003e12V DC, 6–10 W, variable flow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum flow\u003c\/th\u003e\n\u003ctd\u003e300 L\/h (75 GPH) at zero head\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum head\u003c\/th\u003e\n\u003ctd\u003e2.5 m (8 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor type\u003c\/th\u003e\n\u003ctd\u003eSolid-state titanium level and temperature probe\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTemperature accuracy\u003c\/th\u003e\n\u003ctd\u003e±0.1°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubing included\u003c\/th\u003e\n\u003ctd\u003e3 m (10 ft) silicone tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRequires\u003c\/th\u003e\n\u003ctd\u003eRed Sea ReefControl Lite or Pro controller (sold separately)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eBA9028\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eDigital ATO level and temperature sensor\u003c\/li\u003e\n\u003cli\u003e12V DC variable-flow ATO pump\u003c\/li\u003e\n\u003cli\u003eMagnetic sensor mounting bracket\u003c\/li\u003e\n\u003cli\u003e3 m (10 ft) silicone tubing\u003c\/li\u003e\n\u003cli\u003eSiphon breaker\u003c\/li\u003e\n\u003cli\u003eSilent-flow tube holder\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReefControl Lite or Pro controller — this module only functions connected to one of these\u003c\/li\u003e\n\u003cli\u003eRO\/DI reservoir\u003c\/li\u003e\n\u003cli\u003e12VDC power\/connector cable to the controller, if not already supplied with your controller\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis module does not run stand-alone: it needs an existing ReefControl Lite or Pro base unit to plug into. If you don't already own a ReefControl controller, the standalone ReefATO+ 3-in-1 system is the equivalent product that doesn't require one.\u003c\/p\u003e\n\u003ch3\u003ePerformance\u003c\/h3\u003e\n\u003cp\u003eThe pump is rated 300 L\/h at zero head, falling off toward its 2.5 m maximum lift — expect meaningfully less delivered flow the higher the top-off point sits above the reservoir. Red Sea has not published a full head-loss curve for this pump, so treat the 300 L\/h figure as a best-case, zero-head number rather than what reaches your sump in practice.\u003c\/p\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eThe fail-safe logic disables the pump if the sensor disconnects or the pump runs longer than expected, guarding against a stuck-on pump overflowing the sump. It doesn't replace checking the reservoir level and the ATO's operation periodically yourself.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by Red Sea's manufacturer warranty, which applies in addition to your consumer guarantee rights under Australian Consumer Law. Ships as a standard parcel item.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDo I need a ReefControl controller already?\u003c\/h4\u003e\n\u003cp\u003eYes. This module adds ATO functionality to an existing ReefControl Lite or Pro — it has no display or app of its own.\u003c\/p\u003e\n\u003ch4\u003eWhat happens if the sensor loses connection mid-top-up?\u003c\/h4\u003e\n\u003cp\u003eThe pump shuts down automatically as part of the fail-safe logic, rather than continuing to run unmonitored.\u003c\/p\u003e\n\u003ch4\u003eCan I use this instead of the standalone ReefATO+?\u003c\/h4\u003e\n\u003cp\u003eOnly if you already have a ReefControl controller — the ATO Module has no independent controller of its own, unlike the 3-in-1 ReefATO+, which runs on its own hardware.\u003c\/p\u003e\n\u003ch4\u003eWhat glass thickness does the mounting bracket suit?\u003c\/h4\u003e\n\u003cp\u003eRoughly 12mm, matching the bracket used across Red Sea's ReefATO+ sensor range.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/reefcontrol-12vdc-cable\"\u003eReefControl 12VDC Cable\u003c\/a\u003e — the power link between your controller and this module.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":55242223812899,"sku":"BA9028","price":245.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/reefcontrol-ato-module-43138106229027.webp?v=1790230923"},{"product_id":"autoaqua-smart-lite-ato","title":"AutoAqua Smart lite ATO","description":"\u003cp\u003e\u003cstrong\u003eThe same pump and the same lift as the Duo, with a shorter sensor lead and a lower price.\u003c\/strong\u003e The AutoAqua Smart ATO Lite is an optical auto top-off controller that replaces evaporated water from a reservoir, using a DC pump rated at 280 L\/h and 250 cm of head. It reads the water level with an optical sensor rather than a float, so there is no pivot to stick and nothing to corrode. This listing is the original SATO-260P, identified by barcode 4714041211870.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical sensing, no float switch\u003c\/strong\u003e — the failure mode that puts most ATO water on the floor is a float that jams. There is no float here and no moving part in the sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e280 L\/h and 250 cm of head\u003c\/strong\u003e — both figures printed in AutoAqua's own SATO-260P manual, not carried over from the newer model. Enough to lift from a floor-level reservoir into a tank on a standard cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQST over-run protection\u003c\/strong\u003e — the controller times your first refill and raises a visual alert if a later refill runs six times longer. AutoAqua's example: a 10-second normal fill alerts at 60 seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDetects an empty reservoir\u003c\/strong\u003e — QST catches a dry container before the pump runs itself dry, along with bubble interference at the sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong-life pump\u003c\/strong\u003e — the DC refill pump is AutoAqua part DP-200, rated for 30,000 hours and available separately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnet mounted\u003c\/strong\u003e — sensor and tube holder both clamp through glass or acrylic up to 12.7 mm, with nothing to drill.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eSATO-260P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eOptical auto top-off, reservoir fed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower input\u003c\/th\u003e\n\u003ctd\u003e100–240 V AC, 50–60 Hz, covering Australian 240 V \/ 50 Hz mains\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e4.5 W at 12 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePump part number\u003c\/th\u003e\n\u003ctd\u003eDP-200, separately rated 4.8 W at 12 V DC, 30,000 hour life\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum flow (at zero head)\u003c\/th\u003e\n\u003ctd\u003e280 L\/h (74 gph)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum head (at zero flow)\u003c\/th\u003e\n\u003ctd\u003e250 cm (8.2 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensing\u003c\/th\u003e\n\u003ctd\u003eOptical dual sensor, one body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlert\u003c\/th\u003e\n\u003ctd\u003eVisual LED. The SATO-260P manual specifies a visual alert.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum mounting thickness\u003c\/th\u003e\n\u003ctd\u003e12.7 mm, sensor magnet and tube holder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubing supplied\u003c\/th\u003e\n\u003ctd\u003e6.5 mm internal \/ 9.0 mm external diameter, 200 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor to controller cable\u003c\/th\u003e\n\u003ctd\u003e120 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePump cable\u003c\/th\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower adapter cable\u003c\/th\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e1 year\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eAutoAqua publishes no rated aquarium volume, no noise figure and no component dimensions for the SATO-260P. Those rows are absent rather than estimated.\u003c\/p\u003e\n\u003ch3\u003eWhich AutoAqua ATO do I need?\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSmart ATO Lite\u003c\/th\u003e\n\u003cth\u003eSmart ATO Duo\u003c\/th\u003e\n\u003cth\u003eSmart ATO nano G2\u003c\/th\u003e\n\u003cth\u003eSmart ATO RO\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWhat it fills\u003c\/th\u003e\n\u003ctd\u003eAquarium or sump, from a reservoir\u003c\/td\u003e\n\u003ctd\u003eAquarium or sump, from a reservoir\u003c\/td\u003e\n\u003ctd\u003eNano aquarium, from a small reservoir\u003c\/td\u003e\n\u003ctd\u003eYour RO storage reservoir, from the RO line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater mover\u003c\/th\u003e\n\u003ctd\u003eDC refill pump\u003c\/td\u003e\n\u003ctd\u003eDC refill pump\u003c\/td\u003e\n\u003ctd\u003eDC diaphragm pump, built-in anti-siphon\u003c\/td\u003e\n\u003ctd\u003eDC solenoid valve, no pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum flow\u003c\/th\u003e\n\u003ctd\u003e280 L\/h\u003c\/td\u003e\n\u003ctd\u003e280 L\/h\u003c\/td\u003e\n\u003ctd\u003e12 L\/h\u003c\/td\u003e\n\u003ctd\u003eRuns on RO line pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum head\u003c\/th\u003e\n\u003ctd\u003e250 cm\u003c\/td\u003e\n\u003ctd\u003e250 cm\u003c\/td\u003e\n\u003ctd\u003e200 cm suction\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor cable\u003c\/th\u003e\n\u003ctd\u003e120 cm\u003c\/td\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003ctd\u003e45 cm\u003c\/td\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlert\u003c\/th\u003e\n\u003ctd\u003eVisual LED\u003c\/td\u003e\n\u003ctd\u003eAudible and visual, touch button to silence\u003c\/td\u003e\n\u003ctd\u003eVisual LED\u003c\/td\u003e\n\u003ctd\u003eAudible and visual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubing supplied\u003c\/th\u003e\n\u003ctd\u003e6.5 \/ 9.0 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e6.5 \/ 9.0 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e4 \/ 6.4 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e1\/4 inch RO, 300 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTank size stated\u003c\/th\u003e\n\u003ctd\u003eNone published\u003c\/td\u003e\n\u003ctd\u003eNone published\u003c\/td\u003e\n\u003ctd\u003eUnder 50 US gallons (about 190 L)\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eGeneration and version differences\u003c\/h3\u003e\n\u003cp\u003eThis is the first-generation Smart ATO Lite, model SATO-260P. AutoAqua has replaced it with the Smart ATO Lite G2, model SATO-266P, which carries a different barcode. Our stock is the SATO-260P and we are selling it as run-out.\u003c\/p\u003e\n\u003cp\u003eWhat that does and does not mean, honestly:\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSATO-260P (this unit)\u003c\/th\u003e\n\u003cth\u003eSATO-266P (G2)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum flow and head\u003c\/th\u003e\n\u003ctd\u003e280 L\/h, 250 cm\u003c\/td\u003e\n\u003ctd\u003e280 L\/h, 250 cm — unchanged\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePump\u003c\/th\u003e\n\u003ctd\u003eDP-200\u003c\/td\u003e\n\u003ctd\u003eDP-200 — same part\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubing, cables, box contents\u003c\/th\u003e\n\u003ctd\u003eIdentical\u003c\/td\u003e\n\u003ctd\u003eIdentical\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor\u003c\/th\u003e\n\u003ctd\u003eOptical dual sensor\u003c\/td\u003e\n\u003ctd\u003eSquare optical dual sensor, detects at 1 mm, reduced false triggering from water droplets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty in the manual\u003c\/th\u003e\n\u003ctd\u003e1 year\u003c\/td\u003e\n\u003ctd\u003eNot published\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eThe mechanical side is the same unit. The difference worth knowing about is the sensor housing. If you want the current-generation sensor, or a two-year warranty and an audible alarm, the \u003ca href=\"\/products\/autoaqua-smart-ato-duo\"\u003eAutoAqua Smart ATO Duo\u003c\/a\u003e is the model we stock that offers them.\u003c\/p\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSmart ATO Lite controller with optical dual sensor\u003c\/li\u003e\n\u003cli\u003eUniversal power supply\u003c\/li\u003e\n\u003cli\u003eDC refill pump\u003c\/li\u003e\n\u003cli\u003eUniversal tube holder\u003c\/li\u003e\n\u003cli\u003eSiphon break\u003c\/li\u003e\n\u003cli\u003eTubing, 200 cm, 6.5 mm internal \/ 9.0 mm external diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eNot included\u003c\/h4\u003e\n\u003cp\u003eA top-up reservoir is not supplied. AutoAqua's package contents list does not include one, and no size or material is specified.\u003c\/p\u003e\n\u003ch3\u003eWill it fit my tank?\u003c\/h3\u003e\n\u003cp\u003eThe 120 cm sensor lead is the number that decides this one. It is 60 cm shorter than the Duo's, so the controller has to live reasonably close to wherever the sensor sits. On a tank with a sump that usually means mounting the controller inside the cabinet rather than on the outside of it.\u003c\/p\u003e\n\u003cp\u003eThe sensor magnet and the universal tube holder both clamp through glass or acrylic up to 12.7 mm. The pump lead is 180 cm and the pump lifts 250 cm at zero flow, so a reservoir at floor level under a standard cabinet is comfortably within range.\u003c\/p\u003e\n\u003cp\u003eThe siphon break must sit higher than the water level in the reservoir. Mount it lower and the tank can siphon itself back down into the container when the pump stops.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for\u003c\/strong\u003e freshwater and marine aquariums and sumps where the controller can sit within 120 cm of the sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for\u003c\/strong\u003e anyone replacing a float-switch ATO that has stuck once already.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e glass or acrylic thicker than 12.7 mm at the sensor or tube holder position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e installations needing the controller more than 120 cm from the sensor. Choose the Smart ATO Duo instead.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e anyone who wants an audible alarm rather than an LED. The SATO-260P manual specifies a visual alert.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e a nano tank, where 280 L\/h overshoots between readings. The \u003ca href=\"\/products\/autoaqua-smart-ato-g2-nano\"\u003eAutoAqua Smart ATO nano G2\u003c\/a\u003e meters at 12 L\/h.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e a position where micro-bubbles reach the sensor. The manual names bubble interference as a specific cause of false readings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSetup and safety\u003c\/h3\u003e\n\u003cp\u003eMount the sensor at your normal water level and set the siphon break above the reservoir's water line. There is no calibration step.\u003c\/p\u003e\n\u003cp\u003eLearn the LED sequence, because on this model it is the only alert you get. Alternating blue and red is boot-up. Solid blue means refilling. Flashing red is the QST alarm, meaning either bubble interference at the sensor or an empty reservoir.\u003c\/p\u003e\n\u003cp\u003eThe mounting magnets are strong enough that AutoAqua prints an injury warning about them.\u003c\/p\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eRinse the pump inlet when flow drops off, and wipe salt creep from the sensor face so the optics stay clear. Both are five-minute jobs that prevent the two most common nuisance alarms.\u003c\/p\u003e\n\u003cp\u003eThe DP-200 pump is a separate part rated for 30,000 hours, so a tired pump years from now does not mean replacing the controller.\u003c\/p\u003e\n\u003cp\u003eTop-up water is added continuously and never removed, so whatever is dissolved in it accumulates in the tank. That is the argument for filling the reservoir with RO or RO\/DI water rather than tap.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/reef-pure-4-stage-eddentials\"\u003eReef Pure 4 Stage Essentials+\u003c\/a\u003e — an RO\/DI unit so the reservoir is filled with water that will not concentrate in the tank.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/autoaqua-smart-ato-ro-auto-top-for-ro-system\"\u003eAutoAqua Smart ATO RO\u003c\/a\u003e — keeps the reservoir itself topped up from the RO line, so neither container needs watching.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/auto-aqua-smart-smart-level-security\"\u003eAutoAqua Smart Level Security\u003c\/a\u003e — an independent level alarm that cuts power to equipment, outside the Lite's own logic.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/auto-aqua-digital-inline-tds-titanium-s1\"\u003eAutoAqua Digital Inline TDS Titanium S1\u003c\/a\u003e — shows when the RO water going into the reservoir has stopped being pure.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/autoaqua-smart-ato-duo\"\u003eAutoAqua Smart ATO Duo\u003c\/a\u003e — the current-generation alternative, with a 180 cm sensor lead, an audible alarm and a two-year warranty.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eThe SATO-260P manual states a one-year warranty from the purchase date, valid through an authorised reseller. That warranty applies in addition to the consumer guarantees you have under Australian Consumer Law, not instead of them, and those guarantees are unaffected by this being run-out stock.\u003c\/p\u003e\n\u003cp\u003eThe power supply accepts 100–240 V AC at 50–60 Hz, so Australian 240 V \/ 50 Hz mains is within specification. Ships as a standard parcel.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eIs this the Smart ATO Lite G2?\u003c\/h4\u003e\n\u003cp\u003eNo. This is the original AutoAqua Smart ATO Lite, model SATO-260P, barcode 4714041211870. The G2 is model SATO-266P and carries a different barcode. Several retailers list G1 stock under a G2 title, so the barcode is the reliable check.\u003c\/p\u003e\n\u003ch4\u003eWhat actually differs between the SATO-260P and the G2?\u003c\/h4\u003e\n\u003cp\u003eThe pump, flow rate, head, tubing, cable lengths and box contents are the same. The G2 has a redesigned square sensor housing that detects at 1 mm and is less prone to false triggering from water droplets.\u003c\/p\u003e\n\u003ch4\u003eDoes the Smart ATO Lite have an audible alarm?\u003c\/h4\u003e\n\u003cp\u003eThe SATO-260P manual specifies a visual alert only, using the LED. Flashing red is the QST alarm. If you want a buzzer, the Smart ATO Duo's manual specifies an audible and visual alarm with a touch button to silence it.\u003c\/p\u003e\n\u003ch4\u003eHow far can the controller sit from the sensor?\u003c\/h4\u003e\n\u003cp\u003e120 cm, which is the length of the sensor lead. The Smart ATO Duo gives 180 cm if you need the controller further away, for instance mounted on the outside of a cabinet.\u003c\/p\u003e\n\u003ch4\u003eWill the Smart ATO Lite pump 280 L\/h in my setup?\u003c\/h4\u003e\n\u003cp\u003eNot in practice. 280 L\/h is the figure at zero lift. Flow falls as head rises, and the pump stops entirely at 250 cm. A reservoir on the floor beneath a cabinet sits somewhere in between, which is ample for topping up evaporation.\u003c\/p\u003e\n\u003ch4\u003eCan I still get spare parts for a discontinued model?\u003c\/h4\u003e\n\u003cp\u003eThe pump is AutoAqua part DP-200 and is shared with the current G2, so it remains a current spare. Quote SATO-260P rather than the G2 code when ordering sensor or controller parts.\u003c\/p\u003e","brand":"AutoAqua","offers":[{"title":"Default Title","offer_id":55242290757923,"sku":"AA03061","price":159.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/autoaqua-smart-lite-ato-43106844803363.webp?v=1790233227"},{"product_id":"autoaqua-smart-ato-ro-auto-top-for-ro-system","title":"AutoAqua Smart ATO RO Auto Top FOR RO SYSTEM","description":"\u003cp\u003e\u003cstrong\u003eThis fills your RO storage barrel, not your aquarium.\u003c\/strong\u003e The AutoAqua Smart ATO RO is a level controller that opens a solenoid valve on your RO or RO\/DI line when the reservoir runs low, and closes it when the reservoir is full. It has no pump. Line pressure moves the water, and four optical sensor points plus a mechanical float valve stand between you and a flooded floor. This listing is model SATO-460V.\u003c\/p\u003e\n\u003cp\u003eIf what you actually want is a unit that tops the evaporated water back into your display or sump, that is a different product. See the \u003ca href=\"\/products\/autoaqua-smart-ato-duo\"\u003eAutoAqua Smart ATO Duo\u003c\/a\u003e or the \u003ca href=\"\/products\/autoaqua-smart-ato-g2-nano\"\u003eAutoAqua Smart ATO nano G2\u003c\/a\u003e. Many reef setups run one of each: the Smart ATO RO keeps the barrel full, and a reservoir-fed ATO keeps the tank full from that barrel.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNo pump to fail\u003c\/strong\u003e — a DC solenoid valve simply opens and lets your RO system's own pressure do the filling, so there is no impeller, no priming and no dry-run risk.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour optical detection points\u003c\/strong\u003e — two dual-sensor packs. The green pack sets the low level that starts a fill, the blue pack sets the high level that stops it, and each pack carries its own fail-safe point.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMechanical float valve included\u003c\/strong\u003e — a completely independent backstop that does not rely on the electronics, the sensors or the power supply.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQST over-run protection\u003c\/strong\u003e — the controller learns your first fill time and alarms if a later fill runs six times longer, which is what an unnoticed leak or a stuck valve looks like.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudible and visual alarm\u003c\/strong\u003e — the LED colour sequence distinguishes standby, filling, paused, low-level fail-safe, high-level fail-safe and a valve connection failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStops the barrel sitting part-full\u003c\/strong\u003e — filling in full cycles between two set levels rather than trickling means DI resin is not being run at partial flow all day.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eSATO-460V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eReservoir level controller with solenoid valve, for RO and RO\/DI systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater mover\u003c\/th\u003e\n\u003ctd\u003eDC solenoid valve. No pump.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWorking pressure\u003c\/th\u003e\n\u003ctd\u003e0.02–0.7 MPa (0.2–7 bar, roughly 3–100 psi)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSolenoid power\u003c\/th\u003e\n\u003ctd\u003e6 W at 12 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eController power\u003c\/th\u003e\n\u003ctd\u003e4.5 W at 12 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower adapter\u003c\/th\u003e\n\u003ctd\u003e100–240 V AC 50–60 Hz in, 12 V DC 1 A out, covering Australian 240 V \/ 50 Hz mains\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDC connector\u003c\/th\u003e\n\u003ctd\u003e5.5 x 2.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensing\u003c\/th\u003e\n\u003ctd\u003eTwo dual optical sensor packs, four detection points total\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum sensor separation\u003c\/th\u003e\n\u003ctd\u003eBlue pack at least 6 mm above green pack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubing supplied\u003c\/th\u003e\n\u003ctd\u003e1\/4 inch RO tubing, 300 cm, push-connect fittings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor magnet maximum thickness\u003c\/th\u003e\n\u003ctd\u003e12.7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUniversal holder maximum thickness\u003c\/th\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor to controller cable\u003c\/th\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSolenoid cable\u003c\/th\u003e\n\u003ctd\u003e120 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower adapter cable\u003c\/th\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eAutoAqua publishes no orifice size, no noise figure and no component dimensions for this model. Those rows are absent rather than estimated.\u003c\/p\u003e\n\u003ch3\u003eWhich AutoAqua ATO do I need?\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSmart ATO Lite\u003c\/th\u003e\n\u003cth\u003eSmart ATO Duo\u003c\/th\u003e\n\u003cth\u003eSmart ATO nano G2\u003c\/th\u003e\n\u003cth\u003eSmart ATO RO\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWhat it fills\u003c\/th\u003e\n\u003ctd\u003eAquarium or sump, from a reservoir\u003c\/td\u003e\n\u003ctd\u003eAquarium or sump, from a reservoir\u003c\/td\u003e\n\u003ctd\u003eNano aquarium, from a small reservoir\u003c\/td\u003e\n\u003ctd\u003eYour RO storage reservoir, from the RO line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater mover\u003c\/th\u003e\n\u003ctd\u003eDC refill pump\u003c\/td\u003e\n\u003ctd\u003eDC refill pump\u003c\/td\u003e\n\u003ctd\u003eDC diaphragm pump, built-in anti-siphon\u003c\/td\u003e\n\u003ctd\u003eDC solenoid valve, no pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum flow\u003c\/th\u003e\n\u003ctd\u003e280 L\/h\u003c\/td\u003e\n\u003ctd\u003e280 L\/h\u003c\/td\u003e\n\u003ctd\u003e12 L\/h\u003c\/td\u003e\n\u003ctd\u003eRuns on RO line pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum head\u003c\/th\u003e\n\u003ctd\u003e250 cm\u003c\/td\u003e\n\u003ctd\u003e250 cm\u003c\/td\u003e\n\u003ctd\u003e200 cm suction\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor cable\u003c\/th\u003e\n\u003ctd\u003e120 cm\u003c\/td\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003ctd\u003e45 cm\u003c\/td\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlert\u003c\/th\u003e\n\u003ctd\u003eVisual LED\u003c\/td\u003e\n\u003ctd\u003eAudible and visual, touch button to silence\u003c\/td\u003e\n\u003ctd\u003eVisual LED\u003c\/td\u003e\n\u003ctd\u003eAudible and visual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubing supplied\u003c\/th\u003e\n\u003ctd\u003e6.5 \/ 9.0 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e6.5 \/ 9.0 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e4 \/ 6.4 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e1\/4 inch RO, 300 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTank size stated\u003c\/th\u003e\n\u003ctd\u003eNone published\u003c\/td\u003e\n\u003ctd\u003eNone published\u003c\/td\u003e\n\u003ctd\u003eUnder 50 US gallons (about 190 L)\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSmart ATO RO controller with two dual optical sensors\u003c\/li\u003e\n\u003cli\u003eUniversal power adapter\u003c\/li\u003e\n\u003cli\u003eDC solenoid valve for RO line\u003c\/li\u003e\n\u003cli\u003eFloat valve kit, comprising an adjustable float, a universal holder and a quick-connect fitting\u003c\/li\u003e\n\u003cli\u003e1\/4 inch RO tubing, 300 cm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot included\u003c\/h3\u003e\n\u003cp\u003eThis is a controller, not a water maker, and not a complete system. Two things you must already have:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAn RO or RO\/DI system.\u003c\/strong\u003e It is the pressure source and the water source. No booster pump is supplied, and AutoAqua publishes no minimum feed pressure beyond the valve's own 0.02 MPa floor. See the \u003ca href=\"\/products\/reef-pure-4-stage-eddentials\"\u003eReef Pure 4 Stage Essentials+\u003c\/a\u003e if you are starting from nothing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA storage reservoir.\u003c\/strong\u003e The barrel or drum being filled is not supplied, and AutoAqua specifies no size or material.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eAn auto shut-off valve on the RO system is not required. AutoAqua's manual covers installation both with and without one, and the two wiring paths differ, so check which your system has before you start.\u003c\/p\u003e\n\u003ch3\u003eWill it fit my setup?\u003c\/h3\u003e\n\u003cp\u003eThe plumbing side is standard 1\/4 inch RO tubing with push-connect fittings, which is what almost every domestic RO unit uses. Three metres of tubing is supplied.\u003c\/p\u003e\n\u003cp\u003eThe sensor magnets work through a reservoir wall up to 12.7 mm thick, and the universal holder clamps up to 19 mm. Most polyethylene drums and food-grade barrels are well inside both figures.\u003c\/p\u003e\n\u003cp\u003eThe two sensor packs must be mounted with the blue pack at least 6 mm above the green pack. Closer than that and the controller cannot distinguish the two levels.\u003c\/p\u003e\n\u003cp\u003eCable lengths set the geometry: 180 cm from sensors to controller, and 120 cm from controller to solenoid. If your RO unit is further than 120 cm from the controller position, AutoAqua sells 200 cm and 500 cm extension leads.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for\u003c\/strong\u003e automating an RO or RO\/DI storage barrel of any size, for freshwater or marine use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for\u003c\/strong\u003e RO systems both with and without an existing auto shut-off valve.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e topping up an aquarium or sump. It has no pump and mounts on a reservoir.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e installation upstream of your filtration. The solenoid needs filtered water or sediment will hold the valve open.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e a damp or splash-prone position. The G2 datasheet warns the valve body can rust.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e feed pressure outside 0.02–0.7 MPa.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation and safety\u003c\/h3\u003e\n\u003cp\u003eWhere the solenoid goes depends on your RO system. If it has an auto shut-off valve, connect the water line outlet to the solenoid inlet. If it does not, AutoAqua's manual instructs you to cut the tubing between the carbon block filter and the RO membrane and fit the solenoid there. Note that this is before the membrane, not after it.\u003c\/p\u003e\n\u003cp\u003eNever fit the solenoid ahead of the sediment and carbon stages. Filtered water is a stated requirement, and grit is what stops a solenoid seating.\u003c\/p\u003e\n\u003cp\u003eWatch the directional flow arrow on the valve body. Fitted backwards it will not seal.\u003c\/p\u003e\n\u003cp\u003eTwo behaviours that look like faults but are not. The unit performs one automatic fill on every power-up if the low-level sensor is dry. And because the valve has a minimum run of about two seconds and the tubing drains after it closes, the water level will usually settle slightly above the blue sensor.\u003c\/p\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eKeep the sensor faces clean and out of direct light, and away from anywhere micro-bubbles gather. AutoAqua notes that bubbles at the sensor are a cause of overfilling on this model.\u003c\/p\u003e\n\u003cp\u003eAfter any alarm, the QST memory is only cleared by power-cycling the controller. The touch button silences the beep but does not reset the protection, which is deliberate.\u003c\/p\u003e\n\u003cp\u003eCheck the float valve moves freely once or twice a year. It is the only part of this system that still works with the power off.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/autoaqua-smart-asov-elctronice-auto-shut-off-valve-for-ro-di\"\u003eAutoAqua Smart ASOV Auto Shut-Off Valve\u003c\/a\u003e — the electronic shut-off for the RO system itself, a different job from this reservoir controller.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/auto-aqua-digital-inline-tds-titanium-s1\"\u003eAutoAqua Digital Inline TDS Titanium S1\u003c\/a\u003e — tells you when the water filling the barrel has stopped being pure.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/reef-pure-reverse-osmosis-membrane\"\u003eReef Pure Reverse Osmosis Membrane\u003c\/a\u003e — the consumable that determines what actually reaches the reservoir.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/reef-pure-mixed-bed-colour-indicating-di-resin\"\u003eReef Pure Mixed Bed Colour Indicating DI Resin\u003c\/a\u003e — changes colour as it exhausts, so you can see it rather than test for it.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/autoaqua-smart-ato-duo\"\u003eAutoAqua Smart ATO Duo\u003c\/a\u003e — the second half of a fully automated top-up chain, moving water from the barrel into the tank.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eAutoAqua's manual states a two-year limited warranty from the original purchase date, valid through an authorised reseller with proof of purchase. That warranty applies in addition to the consumer guarantees you have under Australian Consumer Law, not instead of them.\u003c\/p\u003e\n\u003cp\u003eThe adapter accepts 100–240 V AC at 50–60 Hz, so Australian 240 V \/ 50 Hz mains is within specification. Ships as a standard parcel.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes the AutoAqua Smart ATO RO top up my aquarium?\u003c\/h4\u003e\n\u003cp\u003eNo. The AutoAqua Smart ATO RO fills an RO or RO\/DI storage reservoir from your RO line. It has no pump and cannot move water into a display tank. Pair it with a reservoir-fed unit such as the Smart ATO Duo if you want the tank topped up as well.\u003c\/p\u003e\n\u003ch4\u003eWhere does the solenoid valve go in my RO system?\u003c\/h4\u003e\n\u003cp\u003eIf your RO unit has an auto shut-off valve, connect the water line outlet to the solenoid inlet. If it does not, AutoAqua's manual has you cut the tubing between the carbon block and the RO membrane and fit the solenoid there. Either way it must sit after the sediment and carbon stages.\u003c\/p\u003e\n\u003ch4\u003eWhat feed pressure does the Smart ATO RO need?\u003c\/h4\u003e\n\u003cp\u003eThe solenoid valve is rated for 0.02 to 0.7 MPa, which is 0.2 to 7 bar or roughly 3 to 100 psi. Typical Australian mains pressure sits comfortably inside that band.\u003c\/p\u003e\n\u003ch4\u003eWhat happens if a sensor fails?\u003c\/h4\u003e\n\u003cp\u003eEach of the two sensor packs carries a fail-safe detection point as well as its working point, giving four in total. Above that, the supplied mechanical float valve closes the line without needing power or electronics. And QST alarms if any fill runs six times longer than the first one it learned.\u003c\/p\u003e\n\u003ch4\u003eDo I still need an auto shut-off valve on my RO unit?\u003c\/h4\u003e\n\u003cp\u003eNo. AutoAqua documents installation both with and without one, and the wiring differs between the two. The Smart ATO RO controls when water flows, which is the job an auto shut-off valve does mechanically.\u003c\/p\u003e\n\u003ch4\u003eWhy does the water level end up slightly above the top sensor?\u003c\/h4\u003e\n\u003cp\u003eThe solenoid has a minimum run time of about two seconds, and the tubing between the valve and the reservoir drains after the valve closes. Both add a small amount of water after the blue sensor is satisfied. AutoAqua describes this as normal.\u003c\/p\u003e","brand":"AutoAqua","offers":[{"title":"Default Title","offer_id":55242290790691,"sku":"AA0309","price":299.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/autoaqua-smart-ato-ro-auto-t-10268577005859-1-dq.webp?v=1790372666"},{"product_id":"autoaqua-smart-ato-duo","title":"AutoAqua Smart ATO Duo","description":"\u003cp\u003e\u003cstrong\u003eEvaporation replaced automatically, before salinity has a chance to drift.\u003c\/strong\u003e The AutoAqua Smart ATO Duo is an auto top-off controller that reads your water level optically, with no float and no moving parts, and refills the tank from a reservoir using a DC pump rated at 280 L\/h. It suits aquariums and sumps where the top-up container sits below the water line, and the 180 cm sensor lead lets the controller sit well clear of splash. This listing is the SATO-280P, the original Duo.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOptical dual-level sensing\u003c\/strong\u003e — one sensor body carries two detection points, an ATO level sensor below and a fail-safe sensor above, so an overfill has to defeat two separate readings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQST over-run protection\u003c\/strong\u003e — the controller learns how long your first refill takes and alarms if a later refill runs six times longer. AutoAqua's worked example: a 10-second normal fill alarms at 60 seconds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudible and visual alert\u003c\/strong\u003e — the Duo's manual specifies an audible and visual alarm, and a touch button silences it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCatches more than a stuck float\u003c\/strong\u003e — QST detects an empty reservoir, a failed sensor and a failed pump, not just a jammed switch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e180 cm sensor lead\u003c\/strong\u003e — 60 cm longer than the Smart ATO Lite, which matters when the controller is mounted outside a cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMagnet mounted, no drilling\u003c\/strong\u003e — sensor and tube holder each clamp through glass or acrylic up to 12.7 mm.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eSATO-280P\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eOptical auto top-off, reservoir fed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower input\u003c\/th\u003e\n\u003ctd\u003e100–240 V AC, 50–60 Hz, covering Australian 240 V \/ 50 Hz mains\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003ctd\u003e4.5 W at 12 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum flow (at zero head)\u003c\/th\u003e\n\u003ctd\u003e280 L\/h (74 gph)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum head (at zero flow)\u003c\/th\u003e\n\u003ctd\u003e250 cm (8.2 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensing\u003c\/th\u003e\n\u003ctd\u003eOptical, two detection points; maximum sensing distance 25.4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum mounting thickness\u003c\/th\u003e\n\u003ctd\u003e12.7 mm, sensor magnet and tube holder\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubing supplied\u003c\/th\u003e\n\u003ctd\u003e6.5 mm internal \/ 9.0 mm external diameter, 200 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor to controller cable\u003c\/th\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePump cable\u003c\/th\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower adapter cable\u003c\/th\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWarranty\u003c\/th\u003e\n\u003ctd\u003e2 years\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eAutoAqua publishes no rated aquarium volume and no noise figure for the Duo. Those rows are absent rather than estimated.\u003c\/p\u003e\n\u003ch3\u003eWhich AutoAqua ATO do I need?\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSmart ATO Lite\u003c\/th\u003e\n\u003cth\u003eSmart ATO Duo\u003c\/th\u003e\n\u003cth\u003eSmart ATO nano G2\u003c\/th\u003e\n\u003cth\u003eSmart ATO RO\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWhat it fills\u003c\/th\u003e\n\u003ctd\u003eAquarium or sump, from a reservoir\u003c\/td\u003e\n\u003ctd\u003eAquarium or sump, from a reservoir\u003c\/td\u003e\n\u003ctd\u003eNano aquarium, from a small reservoir\u003c\/td\u003e\n\u003ctd\u003eYour RO storage reservoir, from the RO line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater mover\u003c\/th\u003e\n\u003ctd\u003eDC refill pump\u003c\/td\u003e\n\u003ctd\u003eDC refill pump\u003c\/td\u003e\n\u003ctd\u003eDC diaphragm pump, built-in anti-siphon\u003c\/td\u003e\n\u003ctd\u003eDC solenoid valve, no pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum flow\u003c\/th\u003e\n\u003ctd\u003e280 L\/h\u003c\/td\u003e\n\u003ctd\u003e280 L\/h\u003c\/td\u003e\n\u003ctd\u003e12 L\/h\u003c\/td\u003e\n\u003ctd\u003eRuns on RO line pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum head\u003c\/th\u003e\n\u003ctd\u003e250 cm\u003c\/td\u003e\n\u003ctd\u003e250 cm\u003c\/td\u003e\n\u003ctd\u003e200 cm suction\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor cable\u003c\/th\u003e\n\u003ctd\u003e120 cm\u003c\/td\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003ctd\u003e45 cm\u003c\/td\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlert\u003c\/th\u003e\n\u003ctd\u003eVisual LED\u003c\/td\u003e\n\u003ctd\u003eAudible and visual, touch button to silence\u003c\/td\u003e\n\u003ctd\u003eVisual LED\u003c\/td\u003e\n\u003ctd\u003eAudible and visual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubing supplied\u003c\/th\u003e\n\u003ctd\u003e6.5 \/ 9.0 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e6.5 \/ 9.0 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e4 \/ 6.4 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e1\/4 inch RO, 300 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTank size stated\u003c\/th\u003e\n\u003ctd\u003eNone published\u003c\/td\u003e\n\u003ctd\u003eNone published\u003c\/td\u003e\n\u003ctd\u003eUnder 50 US gallons (about 190 L)\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eGeneration and version differences\u003c\/h3\u003e\n\u003cp\u003eThis is the original Smart ATO Duo, model SATO-280P, identified by barcode 4714041211825. AutoAqua's current catalogue lists a second-generation Duo, the SATO-286P, in its place.\u003c\/p\u003e\n\u003cp\u003eThe pump specification is unchanged between the two: 280 L\/h and 250 cm of head either way. When ordering a replacement pump or sensor later, quote SATO-280P rather than the G2 code.\u003c\/p\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSmart ATO Duo controller with dual optical sensor\u003c\/li\u003e\n\u003cli\u003eUniversal power adapter\u003c\/li\u003e\n\u003cli\u003eDC refill pump\u003c\/li\u003e\n\u003cli\u003eUniversal tube holder\u003c\/li\u003e\n\u003cli\u003eSiphon break\u003c\/li\u003e\n\u003cli\u003eTubing, 200 cm, 6.5 mm internal \/ 9.0 mm external diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eNot included\u003c\/h4\u003e\n\u003cp\u003eA top-up reservoir is not supplied. AutoAqua's package contents list does not include one, and the manual specifies no reservoir size or material, so the container is your choice.\u003c\/p\u003e\n\u003ch3\u003eWill it fit my tank?\u003c\/h3\u003e\n\u003cp\u003eThe sensor magnet and the universal tube holder both clamp through glass or acrylic up to 12.7 mm. Above that thickness the magnets will not hold reliably.\u003c\/p\u003e\n\u003cp\u003eThe 180 cm sensor lead sets how far the controller can sit from the sensor, and the 180 cm pump lead sets how far the reservoir can sit from the controller. The pump lifts water 250 cm at zero flow, so a reservoir on the floor of a standard cabinet is well inside range.\u003c\/p\u003e\n\u003cp\u003eOne placement rule from the manual: the siphon break must sit higher than the water level in the reservoir, or the tank can siphon itself back down into the container.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for\u003c\/strong\u003e freshwater and marine aquariums and sumps, where evaporation is measured in litres a day rather than millilitres.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for\u003c\/strong\u003e installations where the controller needs to sit away from the water, on the outside of a cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e glass or acrylic thicker than 12.7 mm at the sensor or tube holder position.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e a nano tank, where 280 L\/h overshoots between readings. The \u003ca href=\"\/products\/autoaqua-smart-ato-g2-nano\"\u003eAutoAqua Smart ATO nano G2\u003c\/a\u003e meters at 12 L\/h for exactly that reason.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e dosing additives. AutoAqua publishes no dosing accuracy for this pump and does not present it as a dosing unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e a position where micro-bubbles reach the sensor. The manual warns that bubbles cause false readings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSetup and safety\u003c\/h3\u003e\n\u003cp\u003eMount the dual sensor at your normal water level, with the water reaching the lower detection point. On a small aquarium the upper fail-safe point will trigger after each top-off, and the manual states this is normal.\u003c\/p\u003e\n\u003cp\u003eThe mounting magnets are strong enough that AutoAqua prints an injury warning about them. Worth respecting when you are working one-handed inside a cabinet.\u003c\/p\u003e\n\u003cp\u003eKeep the sensor out of direct light and away from anywhere micro-bubbles collect. Both defeat an optical sensor.\u003c\/p\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eRinse the pump inlet when flow drops off. A fouled inlet is the usual cause of a QST alarm on an otherwise healthy unit. Wipe salt creep and biofilm off the sensor face so the optics stay clear.\u003c\/p\u003e\n\u003cp\u003eFill the reservoir with water your tank already agrees with. Top-up water is added continuously and never removed, so anything dissolved in it accumulates.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/autoaqua-smart-ato-ro-auto-top-for-ro-system\"\u003eAutoAqua Smart ATO RO\u003c\/a\u003e — automates the other half of the job by refilling the reservoir itself from your RO line.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/reef-pure-4-stage-eddentials\"\u003eReef Pure 4 Stage Essentials+\u003c\/a\u003e — an RO\/DI unit to make the top-up water the Duo will be moving.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/auto-aqua-smart-smart-level-security\"\u003eAutoAqua Smart Level Security\u003c\/a\u003e — an independent level alarm that cuts power to equipment, sitting outside the Duo's own logic.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/auto-aqua-digital-inline-tds-titanium-s1\"\u003eAutoAqua Digital Inline TDS Titanium S1\u003c\/a\u003e — shows when the water going into the reservoir has stopped being pure.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/autoaqua-smart-lite-ato\"\u003eAutoAqua Smart ATO Lite\u003c\/a\u003e — the same pump and head with a shorter sensor lead, if the controller can sit close to the tank.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eAutoAqua's manual states a two-year warranty from the date of purchase, valid through an authorised reseller. That warranty applies in addition to the consumer guarantees you have under Australian Consumer Law, not instead of them.\u003c\/p\u003e\n\u003cp\u003eThe adapter accepts 100–240 V AC at 50–60 Hz, so Australian 240 V \/ 50 Hz mains is within specification. Ships as a standard parcel, with no dangerous goods or oversize handling.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes the AutoAqua Smart ATO Duo include a top-up reservoir?\u003c\/h4\u003e\n\u003cp\u003eNo. The AutoAqua Smart ATO Duo ships with the controller and dual optical sensor, a DC pump, a universal tube holder, a siphon break, 200 cm of tubing and a power adapter. You supply the reservoir.\u003c\/p\u003e\n\u003ch4\u003eWhat stops the Smart ATO Duo from overfilling the tank?\u003c\/h4\u003e\n\u003cp\u003eThree separate things. The sensor body carries a fail-safe detection point above the ATO level point. The QST timer alarms if a refill runs six times longer than the first refill it learned. And the controller detects an empty reservoir, a failed sensor and a failed pump.\u003c\/p\u003e\n\u003ch4\u003eHow high can the Smart ATO Duo lift water?\u003c\/h4\u003e\n\u003cp\u003e250 cm at zero flow. Flow falls as head rises, so a reservoir on the floor under a cabinet delivers less than the 280 L\/h headline, which is measured with no lift at all.\u003c\/p\u003e\n\u003ch4\u003eWhat is the difference between the Smart ATO Duo and the Smart ATO Lite?\u003c\/h4\u003e\n\u003cp\u003eBoth use the same DC pump, rated 280 L\/h and 250 cm of head. The Duo has a 180 cm sensor lead against the Lite's 120 cm, adds a touch button, and its manual specifies an audible and visual alarm where the Lite's manual specifies a visual alert. The Lite's manual states a one-year warranty; the Duo's states two.\u003c\/p\u003e\n\u003ch4\u003eWill the Smart ATO Duo work on a rimless tank?\u003c\/h4\u003e\n\u003cp\u003eYes, provided the glass is 12.7 mm or thinner where the sensor magnet and tube holder clamp on. Thicker glass is outside AutoAqua's stated mounting range.\u003c\/p\u003e\n\u003ch4\u003eCan I run the Smart ATO Duo on tap water?\u003c\/h4\u003e\n\u003cp\u003eMechanically yes, and AutoAqua publishes no requirement to use RO or RO\/DI water. In practice top-up water is added continuously and never removed, so anything dissolved in it concentrates in the tank over time.\u003c\/p\u003e","brand":"AutoAqua","offers":[{"title":"Default Title","offer_id":55242290823459,"sku":"AA03082","price":209.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/autoaqua-smart-ato-duo-43106844737827.webp?v=1790233226"},{"product_id":"autoaqua-smart-ato-g2-nano","title":"AutoAqua Smart ATO G2 Nano","description":"\u003cp\u003e\u003cstrong\u003eA nano tank loses the same percentage to evaporation as a big one, and feels it far faster.\u003c\/strong\u003e The AutoAqua Smart ATO nano G2 is a hang-on auto top-off unit that puts the optical sensor, controller and diaphragm pump in one body on the tank rim. It is rated by AutoAqua for aquariums under 50 US gallons, about 190 L, and its pump is deliberately slow at 12 L\/h so a small tank cannot be overshot between sensor readings. This is model SATO-276D, the second-generation nano.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12 L\/h, on purpose\u003c\/strong\u003e — a fast pump on a 40 L tank overshoots before the sensor can react. The nano G2 meters water in slowly, which is why its flow rate is lower than the first-generation nano's 30 L\/h.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in anti-siphon valve\u003c\/strong\u003e — integrated into the pump rather than fitted as a separate inline part, and rated to hold against 30 cm of water. It is replaceable without tools.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e0.3 mm optical sensing\u003c\/strong\u003e — the square dual sensor resolves level changes down to 0.3 mm and works in complete darkness.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eQST over-run protection\u003c\/strong\u003e — the controller learns your first refill time and shuts the pump down with a flashing red LED if a later refill runs six times longer, catching an empty reservoir, a failed pump or a failed sensor.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrefilter on the intake\u003c\/strong\u003e — supplied with a weighted base so it sits upright on the bottom of the reservoir instead of drawing sediment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOne body, no separate controller box\u003c\/strong\u003e — hangs on rims 3 to 10 mm thick with nothing to mount inside the cabinet.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003eSATO-276D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eType\u003c\/th\u003e\n\u003ctd\u003eHang-on optical auto top-off, reservoir fed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRated aquarium volume\u003c\/th\u003e\n\u003ctd\u003eUnder 50 US gallons (about 190 L)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower adapter\u003c\/th\u003e\n\u003ctd\u003e100–240 V AC 50–60 Hz in, 12 V DC 1 A out, covering Australian 240 V \/ 50 Hz mains\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePump\u003c\/th\u003e\n\u003ctd\u003eDC diaphragm, part DP-1212C, 2 W at 12 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum flow (at zero head)\u003c\/th\u003e\n\u003ctd\u003e12 L\/h (3.2 gph)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum suction height\u003c\/th\u003e\n\u003ctd\u003e200 cm (6.5 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAnti-siphon rating\u003c\/th\u003e\n\u003ctd\u003eHolds against 30 cm of water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensing\u003c\/th\u003e\n\u003ctd\u003eSquare dual optical, resolves 0.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor dimensions\u003c\/th\u003e\n\u003ctd\u003e20 x 20 x 25 mm; mounting magnet 20 x 20 x 8 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHang-on holder range\u003c\/th\u003e\n\u003ctd\u003eRim or glass 3–10 mm thick\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor magnet maximum thickness\u003c\/th\u003e\n\u003ctd\u003e12.7 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubing supplied\u003c\/th\u003e\n\u003ctd\u003e4 mm internal \/ 6.4 mm external diameter, 200 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor to controller cable\u003c\/th\u003e\n\u003ctd\u003e45 cm, retractable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower adapter cable\u003c\/th\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eAutoAqua publishes no warranty term, no noise figure and no controller dimensions for this model. Those rows are absent rather than estimated.\u003c\/p\u003e\n\u003ch3\u003eWhich AutoAqua ATO do I need?\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eSmart ATO Lite\u003c\/th\u003e\n\u003cth\u003eSmart ATO Duo\u003c\/th\u003e\n\u003cth\u003eSmart ATO nano G2\u003c\/th\u003e\n\u003cth\u003eSmart ATO RO\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWhat it fills\u003c\/th\u003e\n\u003ctd\u003eAquarium or sump, from a reservoir\u003c\/td\u003e\n\u003ctd\u003eAquarium or sump, from a reservoir\u003c\/td\u003e\n\u003ctd\u003eNano aquarium, from a small reservoir\u003c\/td\u003e\n\u003ctd\u003eYour RO storage reservoir, from the RO line\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater mover\u003c\/th\u003e\n\u003ctd\u003eDC refill pump\u003c\/td\u003e\n\u003ctd\u003eDC refill pump\u003c\/td\u003e\n\u003ctd\u003eDC diaphragm pump, built-in anti-siphon\u003c\/td\u003e\n\u003ctd\u003eDC solenoid valve, no pump\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum flow\u003c\/th\u003e\n\u003ctd\u003e280 L\/h\u003c\/td\u003e\n\u003ctd\u003e280 L\/h\u003c\/td\u003e\n\u003ctd\u003e12 L\/h\u003c\/td\u003e\n\u003ctd\u003eRuns on RO line pressure\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum head\u003c\/th\u003e\n\u003ctd\u003e250 cm\u003c\/td\u003e\n\u003ctd\u003e250 cm\u003c\/td\u003e\n\u003ctd\u003e200 cm suction\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor cable\u003c\/th\u003e\n\u003ctd\u003e120 cm\u003c\/td\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003ctd\u003e45 cm\u003c\/td\u003e\n\u003ctd\u003e180 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAlert\u003c\/th\u003e\n\u003ctd\u003eVisual LED\u003c\/td\u003e\n\u003ctd\u003eAudible and visual, touch button to silence\u003c\/td\u003e\n\u003ctd\u003eVisual LED\u003c\/td\u003e\n\u003ctd\u003eAudible and visual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTubing supplied\u003c\/th\u003e\n\u003ctd\u003e6.5 \/ 9.0 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e6.5 \/ 9.0 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e4 \/ 6.4 mm, 200 cm\u003c\/td\u003e\n\u003ctd\u003e1\/4 inch RO, 300 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTank size stated\u003c\/th\u003e\n\u003ctd\u003eNone published\u003c\/td\u003e\n\u003ctd\u003eNone published\u003c\/td\u003e\n\u003ctd\u003eUnder 50 US gallons (about 190 L)\u003c\/td\u003e\n\u003ctd\u003eNot applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003ch3\u003eGeneration and version differences\u003c\/h3\u003e\n\u003cp\u003eThe first-generation nano was model SATO-270D. AutoAqua publishes both spec sheets, so the changes are verifiable rather than marketing.\u003c\/p\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eSmart ATO nano (SATO-270D)\u003c\/th\u003e\n\u003cth\u003eSmart ATO nano G2 (SATO-276D)\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum flow\u003c\/th\u003e\n\u003ctd\u003e30 L\/h\u003c\/td\u003e\n\u003ctd\u003e12 L\/h\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAnti-siphon valve\u003c\/th\u003e\n\u003ctd\u003eSeparate part supplied in the box\u003c\/td\u003e\n\u003ctd\u003eBuilt into the pump, toolless replacement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAnti-siphon rating\u003c\/th\u003e\n\u003ctd\u003e60 cm of water\u003c\/td\u003e\n\u003ctd\u003e30 cm of water\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSensor\u003c\/th\u003e\n\u003ctd\u003eDual optical, magnetic positioning\u003c\/td\u003e\n\u003ctd\u003eSquare dual optical, resolves 0.3 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eIn the box\u003c\/th\u003e\n\u003ctd\u003eController, adapter, prefilter, anti-siphon valve, tubing\u003c\/td\u003e\n\u003ctd\u003eController, adapter, prefilter, weighted prefilter base, tubing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eUnchanged across both generations: the 12 V DC 1 A universal adapter, 200 cm suction height, 45 cm sensor cable, 200 cm of 4 \/ 6.4 mm tubing, the 3–10 mm hang-on range and the under-50-gallon rating.\u003c\/p\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSmart ATO nano G2 controller, with the square dual optical sensor and the DC diaphragm pump built in\u003c\/li\u003e\n\u003cli\u003eUniversal power adapter\u003c\/li\u003e\n\u003cli\u003ePrefilter\u003c\/li\u003e\n\u003cli\u003eWeighted prefilter base\u003c\/li\u003e\n\u003cli\u003eTubing, 200 cm, 4 mm internal \/ 6.4 mm external diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eNot included\u003c\/h4\u003e\n\u003cp\u003eA top-up reservoir is not supplied. AutoAqua's package contents list does not include one, and no reservoir size is specified, so any clean container within the 200 cm suction height will do.\u003c\/p\u003e\n\u003ch3\u003eWill it fit my tank?\u003c\/h3\u003e\n\u003cp\u003eTwo separate thickness limits apply, and they are easy to confuse. The hang-on holder that carries the controller body fits a rim or glass panel 3 to 10 mm thick. The sensor's own mounting magnet works through glass up to 12.7 mm.\u003c\/p\u003e\n\u003cp\u003eThe sensor cable is only 45 cm. That is generous for a nano rim but it rules out siting the sensor in a remote sump. If the sensor and the controller cannot be within 45 cm of each other, the \u003ca href=\"\/products\/autoaqua-smart-ato-duo\"\u003eAutoAqua Smart ATO Duo\u003c\/a\u003e gives you 180 cm instead.\u003c\/p\u003e\n\u003cp\u003eReservoir placement has a specific rule on this model: the outlet tube must stay above the water surface, and the vertical distance between the outlet and the reservoir's water level must be under 30 cm, which is what the anti-siphon valve is rated to hold.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for\u003c\/strong\u003e freshwater and marine nano and pico tanks under about 190 L, on rims 3 to 10 mm thick.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for\u003c\/strong\u003e small reservoirs, since a 12 L\/h pump empties a 5 L container slowly enough to be practical.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e a large display or sump. At 12 L\/h it would spend most of the day running to keep up.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e direct connection to 1\/4 inch RO tubing. AutoAqua warns this can damage the pump; use the supplied tubing with a 1\/4 inch connector instead.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e running without the prefitted prefilter, which has to sit ahead of the diaphragm pump to protect it.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNot suitable for\u003c\/strong\u003e a spot in direct sunlight or near an infrared source, both of which upset the optical sensor.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSetup and safety\u003c\/h3\u003e\n\u003cp\u003eHang the controller on the rim, drop the prefilter and its weighted base into the reservoir, and run the supplied tubing between them. There is no level adjustment to set. The unit is preset and starts working once powered.\u003c\/p\u003e\n\u003cp\u003eKeep the outlet tube above the water surface. If it ends up submerged, the anti-siphon valve is the only thing standing between your tank and the reservoir.\u003c\/p\u003e\n\u003cp\u003eThe mounting magnets are strong and AutoAqua prints an injury warning about them.\u003c\/p\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eRinse the prefilter whenever flow slows. A clogged prefilter is the most common cause of a QST shutdown on this model, and it is also what stops sediment reaching the diaphragm.\u003c\/p\u003e\n\u003cp\u003eThe pump is designed to be replaced without tools as part DP-1212C, so a worn diaphragm after a few years does not mean a new controller.\u003c\/p\u003e\n\u003cp\u003eWipe salt creep off the sensor face. At 0.3 mm resolution the optics are sensitive to a film.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/reef-pure-4-stage-eddentials\"\u003eReef Pure 4 Stage Essentials+\u003c\/a\u003e — an RO\/DI unit so the water going into the reservoir starts clean.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/auto-aqua-digital-inline-tds-titanium-s1\"\u003eAutoAqua Digital Inline TDS Titanium S1\u003c\/a\u003e — shows when your RO water has stopped being pure, which matters more on a nano where every litre counts.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/auto-aqua-smart-smart-level-security\"\u003eAutoAqua Smart Level Security\u003c\/a\u003e — an independent alarm that cuts power to equipment, working outside the nano G2's own logic.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/autoaqua-smart-ato-duo\"\u003eAutoAqua Smart ATO Duo\u003c\/a\u003e — the step up if you outgrow 190 L or need the sensor further from the controller.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/autoaqua-smart-ato-ro-auto-top-for-ro-system\"\u003eAutoAqua Smart ATO RO\u003c\/a\u003e — keeps the reservoir itself topped up from your RO line.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eAutoAqua does not publish a warranty term for the Smart ATO nano G2, and no Australian distributor states one either. Rather than quote a figure we cannot verify, we have left it out. Your consumer guarantees under Australian Consumer Law apply regardless of what any manufacturer warranty says.\u003c\/p\u003e\n\u003cp\u003eThe adapter accepts 100–240 V AC at 50–60 Hz, so Australian 240 V \/ 50 Hz mains is within specification. Ships as a standard parcel.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhat size tank is the AutoAqua Smart ATO nano G2 for?\u003c\/h4\u003e\n\u003cp\u003eAutoAqua rates the Smart ATO nano G2 for aquariums under 50 US gallons, which is about 190 L. No minimum is stated, and the slow 12 L\/h pump is what makes it workable on very small volumes.\u003c\/p\u003e\n\u003ch4\u003eWhy is the G2 slower than the original nano?\u003c\/h4\u003e\n\u003cp\u003eThe first-generation SATO-270D pumped 30 L\/h; the G2 pumps 12 L\/h. On a small tank a slower fill is more precise, because less water enters between the moment the sensor is satisfied and the moment the pump stops.\u003c\/p\u003e\n\u003ch4\u003eCan I connect the Smart ATO nano G2 straight to 1\/4 inch RO tubing?\u003c\/h4\u003e\n\u003cp\u003eNo. AutoAqua specifically warns that connecting 1\/4 inch RO tubing directly to the pump may damage it. Use the supplied 4 mm internal diameter tubing with a 1\/4 inch connector between the two.\u003c\/p\u003e\n\u003ch4\u003eDoes the Smart ATO nano G2 have an audible alarm?\u003c\/h4\u003e\n\u003cp\u003eAutoAqua documents a flashing red LED when the QST protection trips and the pump stops. No audible buzzer is published for this model, so treat it as a visual alert. The Smart ATO Duo is the model in the range with a documented audible alarm.\u003c\/p\u003e\n\u003ch4\u003eWhat rim thickness does it hang on?\u003c\/h4\u003e\n\u003cp\u003eThe hang-on holder fits a rim or glass panel between 3 and 10 mm thick. The sensor magnet separately works through glass up to 12.7 mm, so the two limits are not the same number.\u003c\/p\u003e\n\u003ch4\u003eCan the pump be replaced on its own?\u003c\/h4\u003e\n\u003cp\u003eYes. The DC diaphragm pump is AutoAqua part DP-1212C and is designed for toolless replacement, so a worn pump does not require a new controller.\u003c\/p\u003e","brand":"AutoAqua","offers":[{"title":"Default Title","offer_id":55242297737507,"sku":"BA8469","price":149.95,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/autoaqua-smart-ato-g2-nano-43508248281379.webp?v=1790234313"},{"product_id":"red-sea-reefato-3-in-1-automatic-top-up-system","title":"Red Sea ReefATO+ 3 in 1 (Automatic Top Up System)","description":"\u003cp\u003e\u003cstrong\u003eTop-off, leak detection and temperature monitoring from one controller.\u003c\/strong\u003e The Red Sea ReefATO+ is an automatic top-off system (ATO, a unit that replaces water lost to evaporation so salinity stays stable) for reef aquariums. A solid-state level sensor with titanium probes runs a quiet, variable-flow 12 V pump, a separate leak detector watches for water where it should not be, and a built-in digital thermometer reports to the ReefBeat app. No reservoir is included; you supply the reservoir and the top-off water.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolid-state level sensing\u003c\/strong\u003e, reading the water's conductivity through titanium probes, so there is no float to stick.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRegulated flow\u003c\/strong\u003e of about 72 litres per hour in normal running, well below the pump's 300 litre maximum.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeak detector\u003c\/strong\u003e: if it finds a leak, auto-fill stops straight away, and once the leak is confirmed a few seconds later the controller sounds an optional alarm and sends a notification to your phone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature logs\u003c\/strong\u003e in the app, showing minimum, maximum and average temperature at 15 minute intervals for the past 28 days.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDry reservoir protection\u003c\/strong\u003e, shutting the pump down if the reservoir runs out of water.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePump: 12 V DC, variable flow, max 300 litres per hour, max head 2.5 m, 6 to 10 W\u003c\/li\u003e\n\u003cli\u003eThermometer accuracy: plus or minus 0.1 degree\u003c\/li\u003e\n\u003cli\u003eTubing: 3 m silicone, 5 mm inside diameter; tube holder clips onto 4 to 12 mm glass\u003c\/li\u003e\n\u003cli\u003eSiphon breaker included\u003c\/li\u003e\n\u003cli\u003eMounting: sensor holder and magnetic corner bracket for 12 mm glass\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable for seawater reef and marine aquariums, topping up the display or sump from a reservoir within the pump's 2.5 m lift. Red Sea states it is suitable for seawater aquariums only, so it is not for freshwater tanks. It is not a dosing pump, and no reservoir is supplied.\u003c\/p\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eKeep the controller and power supply dry and out of splash reach, and run it from an RCD (safety switch) protected outlet.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by your rights under Australian Consumer Law, in addition to any Red Sea manufacturer warranty. Ships by standard parcel post.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default","offer_id":55269635916067,"sku":null,"price":355.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-reefato-3-in-1-autom-43876739481891.webp?v=1790239784"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/collections\/autoaqua-smart-ato-duo-3003891-1600.jpg?v=1788252552","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/collections\/sw-auto-top-off.oembed","provider":"Nicks AOT","version":"1.0","type":"link"}