• Rimless, ultra-clear glass display — beveled edges and a low-profile internal overflow keep the waterline clean with no visible plumbing.
• 118 L pre-plumbed sump — glass construction, ReefGate flow valve and compartments ready for media, a skimmer and a return pump.
• ReefATO+ auto top-off — tops up evaporation automatically, with leak detection and temperature monitoring built in. Marine and reef water only — Red Sea does not rate ReefATO+ for freshwater use.
• 3× ReefLED G2 115 included — app-controlled lighting with mounting arms, so the Deluxe package is ready to run coral-capable light from day one.
• Marine-spec cabinet — plywood construction with epoxy-painted doors and levelling feet, in black or white.
• 5-year warranty — 3 years standard, extended to 5 when you register the product with Red Sea.

• REEFER G3 525 rimless, ultra-clear glass display tank with internal overflow
• Marine-spec cabinet (plywood, epoxy-painted doors, levelling feet) — black or white
• Glass sump with pre-glued plumbing and ReefGate flow valve
• ReefATO+ automatic top-off system with leak detection and temperature monitoring
• 3× Red Sea ReefLED G2 115 light fixtures with mounting arms (Deluxe package)
• 5-year manufacturer warranty (3 years standard, 2 years on product registration)

This is the Deluxe lighting package, not a plug-and-play complete system. The following are not in the box and need to be bought separately before this tank can run:

• Return pump — size to your sump-to-display head height and desired turnover
• Protein skimmer — the sump is laid out for a Red Sea REEFER DC skimmer
• ReefMat fleece roller filter (mechanical filtration upgrade)
• Reef salt, RO/DI water, test kits, aquascape and livestock

If you want a system with the pump and skimmer already fitted, Red Sea's REEFER MAX range is built for that — this REEFER G3 Deluxe is the platform to choose when you want to pick your own pump and skimmer brand and size.

All five systems share the same G3 platform — rimless glass, a pre-plumbed sump and the ReefATO+ top-off system. The differences are footprint, sump capacity and how much ReefLED lighting comes in the box.

The S-550 trades the standard range’s length for extra width and height on a shorter footprint — worth a look if depth and aquascaping options matter more than a long display.

Red Sea publishes PAR at two points for each ReefLED G2 fixture, measured under its own test conditions. We haven't interpolated between them — treat the gap as unpublished, not zero.

Red Sea's own test used a single fixture mounted 21 cm above the centre of a 60 × 60 × 60 cm tank. On this system the 3 fixtures overlap across the full display, so expect higher readings directly under each light and lower readings at the tank's outer edges — and remember the ReefLED app's ramping and acclimation presets can more than halve peak output while corals settle in.

Suitable for: marine and reef keepers building a new display or upgrading from a smaller tank, anyone who wants sump-based filtration with room to add media, dosing and a skimmer of their own choosing, and reefers who'd rather choose their own return pump and skimmer brand than take a bundled one.

Not suitable for: freshwater setups — ReefATO+ is not rated for freshwater use. First-time fishkeepers wanting a true plug-and-play tank (look at REEFER MAX instead). Anyone who hasn't confirmed the installation site can take the filled weight (see Warranty and delivery, below).

Top up the ReefATO+ reservoir on the schedule the alarm prompts rather than waiting for a low-water alert. Rinse or replace mechanical media in the sump on a regular cycle to stop it choking flow back to the return pump. Wipe down the cabinet interior periodically — sumps run humid, and marine-spec plywood still benefits from staying dry. Check ReefLED mounting arms are seated correctly after any aquascape changes so fixtures don't drift out of position.

The ReefATO+ pump and ReefLED drivers run on 220–240V AC, 50Hz — use an RCD-protected circuit and keep drip loops on every cable, as with any aquarium electrical installation. Never let the ReefATO+ reservoir run dry for extended periods; the leak detection is a backstop, not a substitute for checking it. Red Sea doesn't publish an empty or filled weight for this model. As a rough check: 541 L of water alone is roughly 541 kg before glass, sand, rock and cabinet are added.

• A Red Sea Reefer Skimmer 600 PSK1000, sized for this sump's flow.
• A DC return pump sized to your plumbing head height and target turnover.
• A Red Sea reef salt mix and a full reef test kit range, to get water parameters right before livestock goes in.
• The REEFER G3 Deluxe 350 (smaller) or the REEFER G3 Deluxe 625 (deeper), if you’re weighing this size against a neighbour.

Covered by Red Sea's manufacturer warranty: 3 years standard, extended to 5 years when you register the product with Red Sea, in addition to your rights under Australian Consumer Law. This ships as a large glass-and-cabinet system on freight — contact us to confirm delivery access (stairs, doorways, driveway) and lead time before you order.

Does this come with a return pump and protein skimmer?

No. The Deluxe package adds ReefLED lighting to the base G3 platform; the return pump and protein skimmer are sold separately so you can size and brand them yourself.

Can I run this as a freshwater tank?

Not with the included ReefATO+ system — Red Sea doesn't rate it for freshwater use. The tank and sump themselves aren't fresh/marine-specific, but the bundled top-off system is built for reef and marine water.

What's the difference between this and REEFER MAX?

REEFER MAX ships with a return pump and skimmer already fitted as a plug-and-play package. This REEFER G3 Deluxe gives you the tank, sump, ATO and lighting, and leaves the pump and skimmer choice to you.

Is this tank safe on a timber floor?

Check with a builder or structural engineer before installing any system this size upstairs or on a suspended floor. Red Sea doesn't publish an empty or filled weight for this model. As a rough check: 541 L of water alone is roughly 541 kg before glass, sand, rock and cabinet are added.

Which REEFER G3 Deluxe size should I buy?

Compare display volume, footprint and included lighting in the table above — as a rule of thumb, buy for the footprint your room can take rather than the biggest total volume on the list.