Red Sea REEFER G3 Size and Spec Comparison

Every Red Sea REEFER G3 aquarium we sell, with the numbers that actually decide which one you can put in your room: footprint, tank height, total height on the cabinet, and the real water volumes. We built this page because we kept measuring walls for people over the phone. These are the manufacturer’s figures for the system as it ships. Your real water volume will be lower once rock and sand are in. Height on the cabinet is measured to the top rim of the tank with it standing on its stand, which is the number to check against a window sill, a shelf or a low ceiling. Filter by series, by build, or by how much wall you actually have. Tick Compare on any two to four tanks and the numbers come up side by side. Prices are read live from our own catalog.

Ready to order? Select a model below to see live pricing and available configurations. Eligible tank orders to Florida, Texas and California have one $200 Scheduled Freight Delivery charge. We do not ship tanks to Alaska or Hawaii. Key West and Florida Keys installation is available through our aquarium installation service.

Every model, in a table

The same information, laid out to read straight through or print.

Standard REEFER G3

Nine sizes from a two-foot cube up to a six-footer. All of them ship as tank, cabinet, glass sump, pre-glued plumbing with the ReefGate valve, and the ReefATO+ top-off. Filtration, lighting and flow are yours to pick.

Model	Display	Sump	Total system	Footprint (L x W)	Tank height	Height on cabinet
REEFER 170 G3	33.8 gal	9.8 gal	43.6 gal	23.6 x 19.7 in	20.1 in	53.9 in
REEFER 200 G3	41.7 gal	11 gal	52.8 gal	23.6 x 22.6 in	20.9 in	55.1 in
REEFER 250 G3	53.6 gal	11 gal	64.8 gal	35.4 x 19.7 in	20.9 in	55.1 in
REEFER 300 G3	65 gal	15 gal	79.3 gal	35.4 x 22.6 in	21.7 in	55.9 in
REEFER 350 G3	72.1 gal	18 gal	90.3 gal	47.2 x 19.7 in	20.9 in	55.1 in
REEFER 425 G3	90.6 gal	24 gal	114.4 gal	47.2 x 23.6 in	21.7 in	55.9 in
REEFER 525 G3	111.7 gal	31 gal	142.7 gal	59.1 x 23.6 in	21.7 in	55.9 in
REEFER 625 G3	131.3 gal	32 gal	163.8 gal	59.1 x 25.6 in	23.6 in	58.3 in
REEFER 750 G3	158.5 gal	40 gal	198.1 gal	70.9 x 25.6 in	23.6 in	58.3 in

REEFER S G3

The S series is the deep-water platform: 26.8 inches front to back and 25.6 inches of tank height on every model, in an aluminum marine-spec cabinet. On the same wall length you get a lot more display volume and a much deeper water column than the standard REEFER, at the cost of floor depth and a harder lighting job.

Model	Display	Sump	Total system	Footprint (L x W)	Tank height	Height on cabinet
REEFER S-550 G3	118.4 gal	26.7 gal	145.1 gal	47.3 x 26.8 in	25.6 in	60.2 in
REEFER S-700 G3	149.2 gal	35.6 gal	184.8 gal	59.1 x 26.8 in	25.6 in	60.2 in
REEFER S-850 G3	179.6 gal	45 gal	224.5 gal	70.9 x 26.8 in	25.6 in	60.2 in
REEFER S-1000 G3	210 gal	55 gal	264.2 gal	82.7 x 26.8 in	25.6 in	60.2 in

REEFER Peninsula G3

Peninsula tanks are finished on three sides and are built to come off a wall or split two rooms rather than sit flat against drywall. Note the overall heights: 63 and 65 inches, taller than the standard REEFERs, because the cabinet carries the plumbing at one end.

Model	Display	Sump	Total system	Footprint (L x W)	Tank height	Height on cabinet
REEFER Peninsula 350 G3	73.4 gal	19.7 gal	93 gal	37.8 x 25 in	23.6 in	63 in
REEFER Peninsula 500 G3	108.8 gal	28.2 gal	137.1 gal	49.2 x 25 in	23.6 in	63 in
REEFER Peninsula S-700 G3	150 gal	36 gal	186.2 gal	59.4 x 26.8 in	25.6 in	65 in
REEFER Peninsula S-950 G3	200 gal	50 gal	250.2 gal	78.7 x 26.8 in	25.6 in	65 in

Start from the wall, not the gallons

Almost everyone shops these by volume. In practice the wall decides it for you, so here is the same line-up sorted by how much wall each tank eats. Add four to six inches at each end for the cabinet doors and for getting your arm behind the tank.

• About 2 feet (23.6 in): REEFER 170 G3, REEFER 200 G3. Same length, different depth.
• About 3 feet (35.4 in): REEFER 250 G3, REEFER 300 G3.
• Just under 4 feet (37.8 in): REEFER Peninsula 350 G3.
• About 4 feet (47.2 to 49.2 in): REEFER 350 G3, REEFER 425 G3, REEFER S-550 G3, REEFER Peninsula 500 G3.
• About 5 feet (59.1 to 59.4 in): REEFER 525 G3, REEFER 625 G3, REEFER S-700 G3, REEFER Peninsula S-700 G3.
• About 6 feet (70.9 in): REEFER 750 G3, REEFER S-850 G3.
• Over 6 and a half feet (78.7 to 82.7 in): REEFER Peninsula S-950 G3, REEFER S-1000 G3.

Same tank, three ways to buy it

The chassis in the tables above is the same whichever package you order. What changes is how much of the equipment comes fitted at the factory.

• REEFER G3 is the tank, cabinet, sump, plumbing and ReefATO+. You choose lighting, skimming and flow. Buy this one if you already own gear you like.
• REEFER Deluxe G3 adds ReefLED G2 lighting, fitted and mounted at the factory in the right count and position for the tank. Filtration is still yours to choose.
• REEFER MAX G3 adds the full REEF-SPEC package: DC protein skimmer, ReefMat fleece roller and ReefWave circulation, all sized to the tank’s volume at the factory. It runs on day one.

Prices for all three across every size are on our REEFER build planner, read live from our own stock.

Before you order anything

• Measure the height twice. Total height on the cabinet runs from 53.9 to 65 inches. That is the number that hits a window sill or a kitchen cabinet, not the tank height.
• Check the floor on the big ones. Filled, an S-1000 or a Peninsula S-950 puts well over a ton in one line across a room. In older Keys construction that is worth asking somebody about before the freight truck shows up.
• Plan water, drain and power first. On anything over about 100 gallons, retro-fitting those after the tank is standing is the part that turns a good build into a bad month.
• Buy the lid with the tank. Every model has a mesh lid cut for it. Use our Aquarium Lid Finder to match the exact REEFER model; fish find the gap.
• Register the warranty within 90 days. Eligible new Red Sea REEFER systems purchased in the U.S. can receive five-year warranty coverage when the original purchaser registers the system within 90 days. Register on Red Sea’s official warranty page.
• Price the whole build, not the box. The tank is about half of what you actually spend once lighting, return plumbing, rock, salt and a heater are in the cart. We put real numbers to it in what a Red Sea REEFER actually costs.

We are the Red Sea dealer in the Florida Keys

We order any REEFER G3 configuration directly, including sizes and finishes that are not listed on the site. In Key West and down the Keys we also do the whole install: delivery, leveling, plumbing, first fill, cycling and handover. If you want to talk a build through before you spend the money, call the shop at 305-850-9949 and ask for me. Related: REEFER build planner with live pricing · Aquarium Lid Finder · aquarium installation and maintenance · what a saltwater aquarium actually costs · the full Red Sea department.

Need to narrow the lineup to the models that fit your room? Compare every Red Sea REEFER G3 by footprint, real water volume, reef goals and budget in our REEFER Build Planner.