{"product_id":"red-sea-reefer-525-g3","title":"Red Sea REEFER 525 G3 — 142.7 gal Reef Aquarium on a 59 in Cabinet with ReefATO+","description":"\u003ch2\u003eRed Sea REEFER 525 G3 — the 59-inch reef platform\u003c\/h2\u003e\n\u003cp\u003eThe REEFER 525 G3 is the 142.7 gal US (540 L) system of Red Sea's third generation: a 59 in (150 cm) Euro-braced tank in 15 mm ultra-clear glass, a 30.6 gal US (116 L) REEF-SPEC sump that is ReefMat-ready out of the box, and the ReefATO+ auto top-off module included. It replaces the REEFER XL 525 of the G2+ generation — and it happens to be the reef tank we run ourselves at the store.\u003c\/p\u003e\n\u003cp\u003eRed Sea's official introduction to the G3 series:\u003c\/p\u003e\n\u003cdiv style=\"position:relative;padding-bottom:56.25%;height:0;overflow:hidden;max-width:100%;margin:20px 0;\"\u003e\u003ciframe src=\"https:\/\/www.youtube.com\/embed\/ua1FQpOs72s\" title=\"The REEFER G3 series — official Red Sea overview\" loading=\"lazy\" allowfullscreen style=\"position:absolute;top:0;left:0;width:100%;height:100%;border:0;\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e\n\u003ch3\u003eOfficial manufacturer specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003eTotal system water volume:\u003c\/strong\u003e 142.7 gal US (540 L)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDisplay tank volume:\u003c\/strong\u003e 111.7 gal US (423 L)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eIn-cabinet sump volume:\u003c\/strong\u003e 30.6 gal US (116 L)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eDisplay tank dimensions:\u003c\/strong\u003e 59 × 23.6 × 21.7 in (150 × 60 × 55 cm), height excluding light\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eTotal system height:\u003c\/strong\u003e 55.9 in (142 cm)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eUltra-clear glass:\u003c\/strong\u003e 15 mm on the front, sides, bottom and back panels\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eRim type:\u003c\/strong\u003e Euro brace\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eCabinet top height:\u003c\/strong\u003e 34 in (86 cm) from the floor, per the series manual\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eManufacturer-stated full system weight:\u003c\/strong\u003e 1875 lb (850 kg)\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eGlass aquarium weight alone:\u003c\/strong\u003e 275 lb (125 kg)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWeight, clearances and placement\u003c\/h3\u003e\n\u003cp\u003eThe series manual calls for flooring rated to hold 1875 lb (850 kg) once the saltwater aquarium is running. Leave at least 4 in (10 cm) behind the cabinet for cables and chiller airflow, and 24 in (60 cm) between one side and the nearest wall for rear access. Red Sea recommends a stable room at 72 °F (22 °C), away from AC vents, heaters and direct sunlight. The glass tank alone weighs 275 lb (125 kg) — plan enough people to lift it onto the cabinet.\u003c\/p\u003e\n\u003ch3\u003eWhat sets the 525 G3 apart\u003c\/h3\u003e\n\u003cp\u003eThe 525 is the entry point to the 59 in footprint in the straight REEFER line: enough length for a mature SPS reefscape in distinct zones without moving up to the 625's width and height. The G3 generation gives it 15 mm glass on every panel, hydrodynamic piping with a high-precision gate valve for quiet-running downflow, and a fortified plywood cabinet with a dedicated chiller and hardware chamber — a feature of the larger models in the series.\u003c\/p\u003e\n\u003ch3\u003eIn the box — and what is not\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eIncluded:\u003c\/strong\u003e the ultra-clear glass tank, the cabinet, the ReefMat-ready REEF-SPEC glass sump with optional refugium divider, the internal piping kit with return nozzle, and the complete ReefBeat-connected ReefATO+ system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNot included:\u003c\/strong\u003e lighting, return pump, protein skimmer, ReefMat, wave pumps — and the top-off reservoir: the series manual states plainly that REEFER G3 systems do not include a reservoir for the top-off water.\u003c\/p\u003e\n\u003cp\u003eRed Sea's published MAX configuration for this model: \u003ca href=\"\/en\/products\/reefled-g2-eclairage-led\"\u003eReefLED G2\u003c\/a\u003e lighting (3 × 115 or 2 × 170 units), a \u003ca href=\"\/en\/products\/reefrun-g2-dc-pump\"\u003eReefRun G2 8000\u003c\/a\u003e return pump (1080–2200 gph \/ 4100–8300 L\/h) named for the 525 in the series manual, an \u003ca href=\"\/en\/products\/red-sea-600dc-reefer-skimmer\"\u003eRSK 600 DC skimmer\u003c\/a\u003e — the \"Best size for SPS\" pick in the MyREEFER configurator —, a \u003ca href=\"\/en\/products\/red-sea-reefmat-fleece-roller-1200\"\u003eReefMat 1200\u003c\/a\u003e roller filter and two \u003ca href=\"\/en\/products\/red-sea-reefwave®-silent-smart-powerful-45\"\u003eReefWave 45\u003c\/a\u003e gyre pumps.\u003c\/p\u003e\n\u003ch3\u003ePlan for these as well\u003c\/h3\u003e\n\u003cp\u003eSince no top-off reservoir ships with any G3, a \u003ca href=\"\/en\/products\/red-sea-reefcan\"\u003eReefCan\u003c\/a\u003e slides into the cabinet to feed the ReefATO+. To produce RO water for a 142.7 gal system, an RO\/DI unit such as the \u003ca href=\"\/en\/products\/aquaticlife-classic-100-gpd-stage-ro-unit\"\u003eAquaticLife Classic 100 GPD\u003c\/a\u003e covers the need. And because this is an open-top reef tank, a \u003ca href=\"\/en\/products\/red-sea-aquarium-net-cover-24\"\u003eRed Sea net cover\u003c\/a\u003e protects jumping species.\u003c\/p\u003e\n\u003ch3\u003eThe REEF-SPEC sump, in detail\u003c\/h3\u003e\n\u003cp\u003eWater travels down the silent dual-intake downflow into a compact reception chamber, through the 225-micron filter bags, then into the constant-height skimmer chamber. A bubble-trap labyrinth with a coarse sponge guards the return pump compartment, where the ReefATO+ sensor holds a steady level. Installing a ReefMat only takes removing the filter-bag tray and the removable divider — no modification needed. The optional refugium wall splits the main chamber in two for hobbyists growing macroalgae and microfauna.\u003c\/p\u003e\n\u003ch2\u003eOur advice\u003c\/h2\u003e\n\u003cp\u003e\"The 525 G3 is the model we picked for our own home — Myma and me. I went back and forth between the 425 and the 525, but the 525 won my heart; the 625 was a bit more budget than we wanted. The 525 satisfies me one hundred percent. Of all the aquariums I have owned, it is the quietest — you do not hear it at all; compared to our old MAX Nano XXL, it is night and day — and the finish is impeccable, like every Red Sea. With five feet of length and real depth, I can keep the fish I want: I treated myself to tangs, which I love. We installed the ReefATO+ for peace of mind: it draws from a reservoir our RO\/DI unit refills automatically — the level takes care of itself. That said, be realistic: this is a big tank, it is heavy, it takes space and manpower. We lifted the tank onto the cabinet with two people, a friend and me, once the cabinet was built. If this is your first tank this size, you need a solid floor — it is an investment, but everyone who visits is blown away by the aquarium. We have had it for a good while now and our opinion has not changed. Like all Red Sea aquariums, shipping is a flat $100 rate anywhere in Canada, and you have our support at all times to help you.\"\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e— Stéphane, Aquarium ReefSolution\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch3\u003e5-year warranty in Canada\u003c\/h3\u003e\n\u003cp\u003eREEFER G3 systems carry a 3-year warranty, and the original purchaser can extend it to 5 years at no charge by registering the system with Red Sea within 90 days of purchase — Canada is one of the eligible markets. The extension covers the structural integrity of the glass tank and cabinet.\u003c\/p\u003e\n\u003ch3\u003eWhy buy from ReefSolution\u003c\/h3\u003e\n\u003cp\u003eWe are an authorized Red Sea dealer with a store in Laval, Québec, and we run the gear we sell — starting with this very tank. Secure shipping across Canada. Considering a 47 in footprint instead? Have a look at the \u003ca href=\"\/en\/products\/red-sea-reefer-350-g3\"\u003eREEFER 350 G3\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eFAQ — Red Sea REEFER 525 G3\u003c\/h2\u003e\n\u003ch3\u003eWhat comes with the REEFER 525 G3?\u003c\/h3\u003e\n\u003cp\u003eThe 15 mm ultra-clear glass tank, the cabinet, the ReefMat-ready REEF-SPEC sump, the internal piping kit and the ReefATO+ auto top-off system. Lighting, return pump, skimmer and flow pumps are chosen separately.\u003c\/p\u003e\n\u003ch3\u003eWhat return pump does the REEFER 525 G3 need?\u003c\/h3\u003e\n\u003cp\u003eThe series manual recommends one ReefRun G2 8000 (1080–2200 gph \/ 4100–8300 L\/h) for this model — the same pump running on our own 525 G3.\u003c\/p\u003e\n\u003ch3\u003eIs a top-off reservoir included?\u003c\/h3\u003e\n\u003cp\u003eNo. The series manual states that REEFER G3 systems do not include a reservoir for the top-off water. Red Sea's ReefCan is built for that exact job and fits inside the cabinet.\u003c\/p\u003e\n\u003ch3\u003eHow much does a full REEFER 525 G3 weigh?\u003c\/h3\u003e\n\u003cp\u003eRed Sea states 1875 lb (850 kg) for the complete system filled with water. Check your floor rating before setup — the glass tank alone weighs 275 lb (125 kg).\u003c\/p\u003e","brand":"Red Sea Reefer","offers":[{"title":"White","offer_id":42824807841963,"sku":"R45156","price":5999.99,"currency_code":"CAD","in_stock":true},{"title":"Black","offer_id":42824808431787,"sku":"R45155","price":5999.99,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0513\/7108\/1899\/files\/product-20250827-2e78dac1347c3dd65ce09ca3312c2dbf.png?v=1785266719","url":"https:\/\/reefsolution.com\/en\/products\/red-sea-reefer-525-g3","provider":"Aquarium ReefSolution inc.","version":"1.0","type":"link"}