{"product_id":"aqua-ultraviolet-twist-uv-sterilisers-57w","title":"Aqua Ultraviolet Twist UV Sterilisers 57w","description":"\u003cp\u003e\u003cstrong\u003eA UV steriliser's dose changes with flow, so the number on the box is only ever true at one flow rate.\u003c\/strong\u003e The Aqua Ultraviolet Twist UV 57 W Steriliser passes aquarium water past a 57 W UV-C lamp inside a quartz sleeve, exposing everything that flows through to germicidal UV-C light. Run it fast and it clarifies green water and knocks back algae; throttle the flow right back and the same unit delivers a high enough dose to affect free-swimming parasite stages. Which one you get depends entirely on how fast the water moves through it – covered in full below.\u003c\/p\u003e\n\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e57 W UV-C output\u003c\/strong\u003e – sized for saltwater systems up to roughly 355 US gal (1,345 L) at sterilising flow, or freshwater systems up to 3,000 US gal (11,355 L) at clarifying flow.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDose changes with flow\u003c\/strong\u003e – full clarifying flow of up to 3,200 GPH (12,110 L\/h) delivers roughly 30,000 µW·s\/cm² at end-of-lamp-life; throttled back to around 1,066 GPH (4,035 L\/h) it delivers around 90,000 µW·s\/cm² – see the full table below.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e3\/4″ barb inlet and outlet\u003c\/strong\u003e – plumbs in-line with standard aquarium hose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTwist quick-fit design\u003c\/strong\u003e – lamp and sleeve access without unplumbing the unit body.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e~14-month lamp life\u003c\/strong\u003e – UV-C output fades well before the lamp stops visibly glowing, so Aqua Ultraviolet rates the lamp on a service interval rather than \"until it goes out\".\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eUV lamp power\u003c\/th\u003e\n\u003ctd\u003e57 W UV-C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended freshwater tank size\u003c\/th\u003e\n\u003ctd\u003eUp to 3,000 US gal (11,355 L) for sterilisation and clarification\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended saltwater tank size\u003c\/th\u003e\n\u003ctd\u003eUp to 355 US gal (1,345 L) at sterilising flow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInlet \/ outlet\u003c\/th\u003e\n\u003ctd\u003e3\/4″ barb, both ports\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions (approx.)\u003c\/th\u003e\n\u003ctd\u003e508 x 95 x 152 mm (20 x 3.75 x 6 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight (approx.)\u003c\/th\u003e\n\u003ctd\u003e3.2 kg (7 lb)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eLamp replacement interval\u003c\/th\u003e\n\u003ctd\u003eApproximately 14 months of continuous use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWater type\u003c\/th\u003e\n\u003ctd\u003eFreshwater and marine\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003ePerformance – UV dose against flow rate\u003c\/h3\u003e\n\u003cp\u003eThis is the number that actually matters, and it isn't on most retailers' pages: the UV dose this unit delivers falls as flow rises, because faster-moving water spends less time next to the lamp. Aqua Ultraviolet publishes the following saltwater dose table, rated conservatively at end-of-lamp-life rather than with a brand-new lamp:\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eDose at end of lamp life\u003c\/th\u003e\n\u003cth\u003eMaximum flow\u003c\/th\u003e\n\u003cth\u003eWhat it's suited to\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e30,000 µW·s\/cm²\u003c\/td\u003e\n\u003ctd\u003e3,200 GPH (12,110 L\/h)\u003c\/td\u003e\n\u003ctd\u003eGeneral clarity and algae control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e45,000 µW·s\/cm²\u003c\/td\u003e\n\u003ctd\u003e2,133 GPH (8,070 L\/h)\u003c\/td\u003e\n\u003ctd\u003eReef tanks – Aqua Ultraviolet's recommended band for reef systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e60,000 µW·s\/cm²\u003c\/td\u003e\n\u003ctd\u003e1,600 GPH (6,060 L\/h)\u003c\/td\u003e\n\u003ctd\u003eStepped-up general pathogen control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e75,000 µW·s\/cm²\u003c\/td\u003e\n\u003ctd\u003e1,280 GPH (4,845 L\/h)\u003c\/td\u003e\n\u003ctd\u003eMarine fish-only systems – lower end of the disease-control band\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e90,000 µW·s\/cm²\u003c\/td\u003e\n\u003ctd\u003e1,066 GPH (4,035 L\/h)\u003c\/td\u003e\n\u003ctd\u003eMarine fish-only systems – upper end of the disease-control band\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe flow rate that clarifies water and the flow rate that meaningfully affects parasites are not the same setting. At the full 3,200 GPH rated flow, this unit is doing a good job on green water and floating algae, at roughly a third of the dose needed to reliably affect free-swimming parasite stages such as whitespot (ich). To reach the 75,000–90,000 µW·s\/cm² band, flow needs to be throttled back to around 1,066–1,280 GPH – well under half the clarifying flow rate. Slowing the flow that far isn't a settings tweak you make once and forget; it's a different operating mode for a different job.\u003c\/p\u003e\n\u003cp\u003eA UV steriliser run in the disease-control band reduces the free-swimming parasite load passing through the water column – it does not treat parasites already attached to a fish, and it is not a substitute for correct quarantine and treatment of an active outbreak.\u003c\/p\u003e\n\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuitable for freshwater and marine aquariums as an in-line clarifier at high flow, or as a supplementary pathogen-control tool at reduced flow, plumbed after mechanical filtration so debris doesn't shade the lamp. Not a substitute for quarantine procedure, and not a treatment for parasites or bacteria already established on fish or in the display – it only affects organisms that pass through the chamber while the lamp is running.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's included, and what you'll still need\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e steriliser body with the lamp and quartz sleeve fitted, power transformer, and 3\/4″ barb fittings for the inlet and outlet.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eYou'll still need:\u003c\/strong\u003e aquarium hose or pipework sized to 3\/4″, a valve or gate valve if you want to set a specific flow rate for pathogen control, a mounting point in-line after your mechanical filtration, and a GPO protected by a residual current device (RCD\/safety switch), which is good practice for any mains-powered wet-area appliance.\u003c\/p\u003e\n\n\u003ch3\u003eRunning costs\u003c\/h3\u003e\n\u003cp\u003eRun continuously, 57 W works out to roughly 500 kWh a year. At a 30c\/kWh tariff assumption, that's in the order of $150 a year to keep the unit running around the clock – your own tariff and hours of use will move that figure.\u003c\/p\u003e\n\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eReplace the lamp at around 14 months of continuous use, even though it will still be glowing – UV-C germicidal output fades well before the visible light does. Wipe or replace the quartz sleeve at the same time; a scaled or scratched sleeve blocks UV-C output regardless of how new the lamp is.\u003c\/p\u003e\n\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eMains-powered wet-area appliance – install on a GPO protected by an RCD\/safety switch. Never look directly at the lamp while the unit is powered and open; UV-C causes eye and skin burns. Switch off and unplug before opening the housing to service the lamp or sleeve.\u003c\/p\u003e\n\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aqua-ultraviolet-twist-uv-57w-lamp\"\u003eAqua Ultraviolet Twist UV 57W Replacement Lamp\u003c\/a\u003e – the annual service part.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/aqua-ultraviolet-twist-uv-25w-57w-quart-sleeve\"\u003eAqua Ultraviolet Twist UV 25W\/57W Quartz Sleeve\u003c\/a\u003e – replace alongside the lamp if scaled or scratched.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/auv-barb-fitting-2pk\"\u003eAqua Ultraviolet 3\/4\" Barb Fitting 2pk\u003c\/a\u003e – spare inlet\/outlet fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by Aqua Ultraviolet's manufacturer warranty, in addition to your rights under Australian Consumer Law. Standard delivery Australia-wide.\u003c\/p\u003e\n\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eWhat flow rate should I run it at for a reef tank?\u003c\/h4\u003e\n\u003cp\u003eAqua Ultraviolet's own guidance puts reef systems in the 30,000–45,000 µW·s\/cm² band, which on this unit is a flow of roughly 2,133–3,200 GPH (8,070–12,110 L\/h).\u003c\/p\u003e\n\u003ch4\u003eWill this cure whitespot (ich) in my display tank?\u003c\/h4\u003e\n\u003cp\u003eNo single piece of equipment cures an active outbreak on its own. Run at the 75,000–90,000 µW·s\/cm² band (roughly 1,066–1,280 GPH), a UV steriliser reduces the free-swimming parasite stages reinfecting your fish, alongside proper treatment and quarantine – it doesn't reach parasites already attached to a fish.\u003c\/p\u003e\n\u003ch4\u003eDo I need a separate controller to slow the flow down?\u003c\/h4\u003e\n\u003cp\u003eNo controller is required – a simple gate valve or ball valve on the plumbing either side of the unit lets you dial the flow back to the dose you need.\u003c\/p\u003e\n\u003ch4\u003eDoes the dose table assume a new lamp or an old one?\u003c\/h4\u003e\n\u003cp\u003eAn old one – Aqua Ultraviolet rates these figures at end-of-lamp-life, so the dose you actually get is never worse than what's shown, and is higher with a fresh lamp fitted.\u003c\/p\u003e\n\u003ch4\u003eCan I run this on a freshwater pond as well as a marine tank?\u003c\/h4\u003e\n\u003cp\u003eYes – it's rated to 3,000 US gal (11,355 L) for freshwater sterilisation and clarification, well beyond most home aquariums.\u003c\/p\u003e","brand":"Aqua Ultraviolet","offers":[{"title":"Default Title","offer_id":55242236100899,"sku":"BA8303","price":1295.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/aqua-ultraviolet-twist-uv-sterilisers-57w-3006582-1600.jpg?v=1781836593","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/aqua-ultraviolet-twist-uv-sterilisers-57w","provider":"Nicks Aquarium Oceanarium Terrarium","version":"1.0","type":"link"}