{"product_id":"red-sea-reefrun-g2-4000-dc-pump-w-o-reefbeat-controller","title":"Red Sea ReefRun G2 4000 DC Pump","description":"\u003cp\u003e\u003cstrong\u003eQuiet, controllable DC return flow for compact systems.\u003c\/strong\u003e The Red Sea ReefRun G2 4000 is the entry point of Red Sea's DC return pump range, adjustable between 2,000 and 4,000 L\/h with the same sine-wave DC motor and quiet running as the rest of the G2 line. Sold as a pump body only — it needs its own flow controller, purchased separately, before it will run.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e2,000–4,000 L\/h adjustable flow\u003c\/strong\u003e — dial return flow to match a nano or standard-size system rather than running an oversized pump throttled right down.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRated to 3.4 m of head\u003c\/strong\u003e — enough lift for most standard cabinet-and-sump setups.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSine-wave DC motor\u003c\/strong\u003e — designed by Red Sea for quiet running even at full speed, without the whine some AC pumps develop as they age.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e180° rotatable outlet and universal fittings\u003c\/strong\u003e — hose barbs and threaded connectors sized for metric and US-standard piping, plus PVC adapters.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact footprint\u003c\/strong\u003e — sized for Reefer and similarly compact sumps rather than large custom systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eRED1010\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlow range\u003c\/th\u003e\n\u003ctd\u003e2,000–4,000 L\/h (530–1,060 US gph)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMax head\u003c\/th\u003e\n\u003ctd\u003e3.4 m (11.2 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDimensions\u003c\/th\u003e\n\u003ctd\u003eapprox. 17.5 x 10.9 x 13 cm (6.9 x 4.3 x 5.1 in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower consumption\u003c\/th\u003e\n\u003ctd\u003e16–38 W, depending on speed setting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePower cable length\u003c\/th\u003e\n\u003ctd\u003eapprox. 3 m, connector positioned 1 m from the pump body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutlet fittings\u003c\/th\u003e\n\u003ctd\u003eHose barb and threaded connector, metric and US-standard compatible\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e230–240 V, 50 Hz AU mains (via included power supply)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eController\u003c\/th\u003e\n\u003ctd\u003eNot included — flow controller required, sold separately\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eRed Sea's published documentation does not state this pump's weight or a dB noise figure. Ask us to confirm with Red Sea if either matters for your install.\u003c\/p\u003e\n\u003ch3\u003eWhat's included \/ Not included\u003c\/h3\u003e\n\u003cp\u003eIn the box: the ReefRun G2 4000 pump, outlet fittings and its power supply. Not included: a flow controller, which Red Sea's documentation states is mandatory before the pump will run at all, regardless of whether you also add a ReefRun Dual DC Pump Controller for ReefBeat scheduling.\u003c\/p\u003e\n\u003ch3\u003eWhich ReefRun G2 pump do I need?\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eFlow range\u003c\/th\u003e\n\u003cth\u003eMax head\u003c\/th\u003e\n\u003cth\u003ePower\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReefRun G2 4000\u003c\/td\u003e\n\u003ctd\u003e2,000–4,000 L\/h\u003c\/td\u003e\n\u003ctd\u003e3.4 m\u003c\/td\u003e\n\u003ctd\u003e16–38 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReefRun G2 6000\u003c\/td\u003e\n\u003ctd\u003e3,600–6,500 L\/h\u003c\/td\u003e\n\u003ctd\u003e4.4 m\u003c\/td\u003e\n\u003ctd\u003e22–56 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReefRun G2 8000\u003c\/td\u003e\n\u003ctd\u003e4,100–8,300 L\/h\u003c\/td\u003e\n\u003ctd\u003e5.3 m\u003c\/td\u003e\n\u003ctd\u003e24–73 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReefRun G2 12000\u003c\/td\u003e\n\u003ctd\u003e5,000–12,000 L\/h\u003c\/td\u003e\n\u003ctd\u003e5.9 m\u003c\/td\u003e\n\u003ctd\u003e33–105 W\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eThe 4000 suits nano and standard-size reef and marine tanks where turnover requirements are modest and the sump riser is short. Move up the range if your system needs more than 4,000 L\/h at your actual plumbing head, not just at the pump face.\u003c\/p\u003e\n\u003ch3\u003ePerformance\u003c\/h3\u003e\n\u003cp\u003e2,000–4,000 L\/h is Red Sea's adjustable flow band at low head; real delivered flow falls as lift increases toward the 3.4 m maximum. Red Sea has not published the intermediate flow-at-head figures as a full curve — as a working assumption, expect flow toward the lower end of the adjustable range once you're above roughly 1.5–2 m of lift. Ask us for Red Sea's engineering data if you need the precise figure for your plumbing run.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuited to nano and standard-size reef and marine systems, and as a quiet, efficient upgrade over an old AC return pump. Not the right choice if your system needs more than 4,000 L\/h of real delivered flow, or more than 3.4 m of head — step up to the G2 6000 or 8000 instead. Requires its own flow controller to operate.\u003c\/p\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eInspect and clean the impeller periodically, particularly with mineral-heavy top-off water or a heavy bioload. Keep the inlet flow guide clear so it can keep air out of the intake.\u003c\/p\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eMains-powered and rated for wet-area sump installation — run it from an RCD-protected circuit and keep a drip loop in the cable before any power point or power board.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by Red Sea's manufacturer warranty, in addition to your consumer guarantee rights under Australian Consumer Law. Ships as a standard parcel item.\u003c\/p\u003e\n\u003ch3\u003eGoes well with\u003c\/h3\u003e\n\u003cp\u003eA ReefRun G2 4000 flow controller — mandatory, not optional, for this pump to run. Add a ReefRun Dual DC Pump Controller if you're pairing it with a second ReefRun pump or DC skimmer pump and want both on one ReefBeat schedule.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this pump include a controller?\u003c\/h4\u003e\n\u003cp\u003eNo. This is the pump body only — a matching ReefRun G2 4000 flow controller is required separately before it will run.\u003c\/p\u003e\n\u003ch4\u003eWill I get the full 4,000 L\/h through my plumbing?\u003c\/h4\u003e\n\u003cp\u003eOnly at very low head. Expect meaningfully less once the pump is lifting water through a sump riser and any elbows or fittings.\u003c\/p\u003e\n\u003ch4\u003eIs this the right pump for a nano tank?\u003c\/h4\u003e\n\u003cp\u003eIts adjustable range starts at 2,000 L\/h, which is high turnover for a genuinely small nano — check your tank's recommended turnover before sizing up to this pump.\u003c\/p\u003e\n\u003ch4\u003eCan it run a DC skimmer pump on the same controller?\u003c\/h4\u003e\n\u003cp\u003eThe pump itself needs its own flow controller regardless. A separate ReefRun Dual DC Pump Controller can then link this pump and a compatible DC skimmer pump together for shared ReefBeat scheduling.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774163472675,"sku":"RED1010","price":350.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-reefrun-g2-4000-dc-p-43876704420131.webp?v=1790239295","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/red-sea-reefrun-g2-4000-dc-pump-w-o-reefbeat-controller","provider":"Nicks AOT","version":"1.0","type":"link"}