{"product_id":"red-sea-reefer-s-850-g3-black","title":"Red Sea Reefer S-850 G3 Black","description":"\u003cp\u003e\u003cstrong\u003eRed Sea's quietest Reefer plumbing yet, in an 850 L rimless shell.\u003c\/strong\u003e The REEFER-S 850 G3 in black is the third-generation version of Red Sea's large-format REEFER-S platform: the same 850 L display, cabinet and sump layout as the G2+ generation, rebuilt around a redesigned flow system that Red Sea states delivers up to 50% more circulation at lower noise and lower power draw. Like the G2+, this is the base tier — lighting, return pump and skimmer are bought separately.\u003c\/p\u003e\n\u003ch3\u003eKey features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e850 L total system volume\u003c\/strong\u003e — 680 L display over a 170 L sump.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRedesigned G3 plumbing\u003c\/strong\u003e — fewer 90-degree bends and a curved return outlet, which Red Sea states improves circulation and lowers running noise compared with the previous generation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReefGate flow valve\u003c\/strong\u003e — precise control over the drain rate, aimed at near-silent overflow operation at a stable water level.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable surface skimmer on the overflow box\u003c\/strong\u003e — built into the central overflow for easier maintenance access.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e19 mm ultra-clear, rimless glass\u003c\/strong\u003e — Euro-braced and bottom-braced for structural rigidity without a full top rim.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReefATO+ auto top-off included\u003c\/strong\u003e — top-off, temperature monitoring and leak detection, standard across the G3 range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReefMat-ready sump chamber\u003c\/strong\u003e — built to take Red Sea's automatic filter roller if you add one later.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat's included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eREEFER-S 850 G3 aquarium with integrated central overflow box and removable surface skimmer\u003c\/li\u003e\n\u003cli\u003eMarine-spec cabinet in black, aluminium-framed with plywood panels\u003c\/li\u003e\n\u003cli\u003eGlass sump with pre-glued plumbing, split main and multipurpose extension chamber\u003c\/li\u003e\n\u003cli\u003e2 x 32 mm dual return-pump outlets\u003c\/li\u003e\n\u003cli\u003e2 x 225-micron filter bags and media cups\u003c\/li\u003e\n\u003cli\u003eReefATO+ auto top-off with temperature sensor and leak detector\u003c\/li\u003e\n\u003cli\u003eSlide-out control panel and ReefGate flow valve\u003c\/li\u003e\n\u003cli\u003eLevelling feet\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNot included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eReturn pump — \u003ca href=\"\/collections\/sw-return-water-pumps\"\u003esized and bought separately\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eProtein skimmer — \u003ca href=\"\/collections\/sw-protein-skimmers\"\u003ethis is the base tier, not the MAX\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eLighting — no fixture or mounting arms fitted; see our \u003ca href=\"\/collections\/aquarium-lighting\"\u003eaquarium lighting range\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeater and any temperature controller\u003c\/li\u003e\n\u003cli\u003eChiller\u003c\/li\u003e\n\u003cli\u003eDosing pump system\u003c\/li\u003e\n\u003cli\u003eReefMat automatic filter roller (though the sump chamber is built to take one)\u003c\/li\u003e\n\u003cli\u003eRO\/DI unit and saltwater mix — the tank ships dry\u003c\/li\u003e\n\u003cli\u003eLive rock, sand, aquascape and livestock\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\"G3\" and \"REEFER-S 850\" describe the tank, cabinet, sump and plumbing only. If a listing elsewhere says \"MAX\", that's a different, fully-equipped product at a different price point — this one is the base platform for you to equip yourself.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay dimensions (L x W x H)\u003c\/th\u003e\n\u003ctd\u003e180 x 68 x 65 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal system height (with cabinet)\u003c\/th\u003e\n\u003ctd\u003e153 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDisplay volume\u003c\/th\u003e\n\u003ctd\u003e680 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSump volume\u003c\/th\u003e\n\u003ctd\u003e170 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTotal system volume\u003c\/th\u003e\n\u003ctd\u003e850 L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGlass thickness (front, side, bottom)\u003c\/th\u003e\n\u003ctd\u003e19 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGlass type\u003c\/th\u003e\n\u003ctd\u003eUltra-clear, rimless, Euro-braced and bottom-braced\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCabinet colour\u003c\/th\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCabinet construction\u003c\/th\u003e\n\u003ctd\u003eAluminium-framed with marine-spec plywood panels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eReturn outlets\u003c\/th\u003e\n\u003ctd\u003e2 x 32 mm dual return-pump outlets\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAuto top-off\u003c\/th\u003e\n\u003ctd\u003eReefATO+ (included)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGeneration\u003c\/th\u003e\n\u003ctd\u003eG3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\n\u003cp\u003eRed Sea hasn't published an empty or filled weight for this model. Water alone runs to roughly 850 kg at full volume before cabinet, glass, rock and sand are added — have the floor checked before it goes anywhere other than a slab or reinforced ground floor.\u003c\/p\u003e\n\u003ch3\u003eGeneration differences — G2+ to G3\u003c\/h3\u003e\n\u003cp\u003eThe move to G3 is a plumbing and flow redesign rather than a change in tank size or glass spec. Red Sea's own material for G3 states a redesigned flow system delivering up to 50% more water circulation at lower energy consumption, plumbing with fewer sharp 90-degree bends to cut turbulence and noise, a new ReefGate valve for precise drain control, curved return outlets for better distribution, and an enlarged downflow inlet to reduce turbulence. ReefATO+ auto top-off was standard from the G2+ revision onward and continues unchanged in role on G3. We haven't been able to confirm whether G2+ and G3 sump and plumbing spares are interchangeable — check with us before ordering a spare part across generations.\u003c\/p\u003e\n\u003ch3\u003eSuitable for, and not suitable for\u003c\/h3\u003e\n\u003cp\u003eSuited to a reefer who wants Red Sea's quietest, highest-flow Reefer plumbing to date and is choosing their own return pump, skimmer and lighting. Not the right choice if you want equipment fitted out of the box — for that, ask us whether a MAX configuration of this model is available.\u003c\/p\u003e\n\u003ch3\u003eCare and maintenance\u003c\/h3\u003e\n\u003cp\u003eThe removable surface skimmer on the overflow box is designed for easier routine cleaning than a fixed weir. Filter bags in the sump need regular changing unless a ReefMat roller is added; the ReefATO+ sensor and reservoir need periodic checks and top-ups with RO\/DI water.\u003c\/p\u003e\n\u003ch3\u003eSafety\u003c\/h3\u003e\n\u003cp\u003eReefATO+ and any equipment you add are mains-powered — run everything through an RCD-protected circuit with drip loops on cables entering the cabinet. Check the ReefGate valve setting after any plumbing work; an incorrectly set valve affects both noise and overflow water level.\u003c\/p\u003e\n\u003ch3\u003eWarranty and delivery\u003c\/h3\u003e\n\u003cp\u003eCovered by Red Sea's manufacturer warranty — 3 years standard, extendable to 5 years at no extra cost by registering the tank with Red Sea online — in addition to your consumer guarantee rights under Australian Consumer Law. This is an oversized, heavy item; expect a two-person delivery and confirm doorway and stair clearance before ordering.\u003c\/p\u003e\n\u003ch3\u003eCommon questions\u003c\/h3\u003e\n\u003ch4\u003eDoes this include a return pump, skimmer or lights?\u003c\/h4\u003e\n\u003cp\u003eNo — this base configuration includes the tank, cabinet, sump, plumbing and ReefATO+ auto top-off only.\u003c\/p\u003e\n\u003ch4\u003eWhat actually changed from the G2+ version?\u003c\/h4\u003e\n\u003cp\u003eMainly the plumbing and flow design: Red Sea states up to 50% more circulation, a new ReefGate valve for quieter drain control, curved return outlets and a redesigned downflow inlet. Tank size, glass thickness and the ReefATO+ auto top-off are unchanged.\u003c\/p\u003e\n\u003ch4\u003eIs the sump ready for a ReefMat filter roller?\u003c\/h4\u003e\n\u003cp\u003eYes — the sump chamber is built to take one, though the roller itself is sold separately.\u003c\/p\u003e\n\u003ch4\u003eHow much does it weigh filled?\u003c\/h4\u003e\n\u003cp\u003eRed Sea hasn't published a filled weight for this model. Water alone is roughly 850 kg at full volume — get the floor checked before siting it anywhere other than a slab or reinforced ground floor.\u003c\/p\u003e\n\u003ch4\u003eWill G2+ spare parts fit this tank?\u003c\/h4\u003e\n\u003cp\u003eWe can't confirm that either way — Red Sea maintains generation-specific spare parts listings, and we haven't found a source confirming shared parts between G2+ and G3. Check with us before ordering a spare part for this tank.\u003c\/p\u003e","brand":"RedSea","offers":[{"title":"Default Title","offer_id":54774163898659,"sku":"RED2022","price":9530.0,"currency_code":"AUD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0972\/7236\/5347\/files\/red-sea-reefer-s-850-g3-blac-46119456702755.webp?v=1790239294","url":"https:\/\/nicksaquariumoceanariumterrarium.com.au\/products\/red-sea-reefer-s-850-g3-black","provider":"Nicks AOT","version":"1.0","type":"link"}