Red Sea REEFER Peninsula G3 Aquarium System 350

• 352 L total system volume – a 277 L display over a 74.5 L sump.
• Peninsula format – viewable from three sides, designed as a room divider.
• Rimless ultra-clear glass, 15 mm – the 350 is the one Peninsula G3 size that skips the Euro-brace used on the larger models.
• G3 plumbing – a redesigned, fewer-bends piping layout that Red Sea states delivers up to 50% more water circulation than the prior generation, with a new ReefGate valve for finer drain control.
• ReefATO+ auto top-off – top-off dosing, leak detection and temperature monitoring in one unit, fitted as standard on G3.
• Pre-glued sump plumbing – arrives ready to use, no gluing required.
• ReefMat-ready sump – accepts Red Sea's automatic filter roller if you add one later; the roller itself is sold separately.

• REEFER Peninsula 350 G3 rimless display aquarium
• Marine-spec cabinet, laminated plywood, epoxy-painted, reversible doors
• Glass sump with pre-glued, ready-to-use plumbing and micron filter sock holders
• ReefGate high-precision flow valve
• ReefATO+ auto top-off, leak detector and temperature monitor

• Lighting – Red Sea pairs this size with 2 x ReefLED 90-class fixtures on its own Deluxe package; both sold here as separate items
• Return pump – see the ReefRun G2 4000 DC pump
• Protein skimmer – see the Reefer Skimmer 300
• Circulation pumps – see the ReefWave 25
• ReefMat automatic filter roller – the sump accepts one, but it's sold separately
• Heater, chiller and any temperature controller
• Dosing pump system
• RO/DI unit and saltwater mix – the tank ships dry
• Live rock, sand, aquascape and livestock

This is the Standard tier: aquarium, cabinet and plumbed sump only. Red Sea also sells this tank as a Deluxe package (adding lighting) and a MAX package (adding lighting, pump, skimmer, circulation and filter roller) – check which tier a listing describes before comparing prices, since they're different purchases at different price points.

Allow approximately 160 cm of total system height plus ceiling clearance for lid access. As a peninsula design meant to be walked around, leave clearance on more than one side. At 352 L, water alone weighs roughly 352 kg before cabinet, glass, rock and substrate are added; Red Sea has not published a filled weight for this model. If it's going anywhere other than a slab or reinforced ground floor, get the floor checked before it goes in.

The 350 is the smallest Peninsula in the G3 range and the only one built without Euro-bracing – Red Sea adds that reinforcement from 500 upward. Step up to an S-series model if you want the reinforced aluminium cabinet structure and slide-out control panel that come with the larger sizes.

Suited to a reefer wanting a compact peninsula display with current-generation G3 plumbing, choosing lighting and pumps to their own budget and spec. Not the right fit if you want equipment pre-matched and fitted – look at the Deluxe or MAX package of this same tank instead. Not a first marine tank without a plan for lighting, flow and skimming, none of which are included here.

Check the ReefGate valve and downflow after any plumbing disturbance to keep drain flow quiet. The ReefATO+ probe benefits from a monthly wipe to prevent salt-creep misreads. Once lighting and pumps are fitted, they carry their own separate service schedules.

The ReefATO+ unit is mains-powered – run it through an RCD-protected circuit with a drip loop on the cable. Any lighting, pumps or heater you add should be sized and installed per their own manufacturer instructions, particularly around drip loops and circuit protection.

Red Sea's REEFER G3 systems carry a 3-year warranty as standard, extendable to 5 years if the system is registered within 90 days of purchase. This is in addition to your consumer guarantee rights under Australian Consumer Law. This is a large glass item – confirm delivery access and doorway clearance before ordering, and expect an oversized freight or two-person delivery depending on your address.

Does this include lighting?

No. This is the Standard tier – aquarium, cabinet and plumbed sump only. Red Sea's own Deluxe package of this tank adds 2 x ReefLED-class fixtures if you'd rather buy it pre-matched.

Why doesn't the 350 have Euro-bracing when the larger models do?

Red Sea only adds Euro-bracing to Peninsula G3 models from the 500 upward; the 350 is fully rimless. It doesn't affect the glass thickness at this size – both are 15 mm.

What return pump and skimmer suit this size?

Red Sea's own MAX package of this tank pairs it with a ReefRun-class DC return pump and a Reefer Skimmer 300; either is a reasonable starting point, sized against your final stocking plan.

How much does a filled system weigh?

Red Sea has not published a filled weight for this model. Water alone is roughly 352 kg; add glass, cabinet, rock, sand and equipment on top, and have the floor checked if it's going anywhere other than a slab or reinforced ground floor.

What's different between G3 and the older G2+ plumbing?

Red Sea states the G3 piping layout uses fewer sharp bends and delivers up to 50% more water circulation than the prior generation, alongside the new ReefGate flow valve for quieter, finer drain control.