Red Sea Max Nano G2 XXL Aquarium

The Red Sea Max Nano G2 XXL Aquarium is a premium 200 litre / 53 gallon all-in-one reef aquarium system that brings the clean rear-sump simplicity of the MAX NANO family into a larger 90 cm display format with serious reef capacity.

This aquarium-only XXL version is built for hobbyists who want a pro-size compact reef display without committing to a traditional plumbed sump system. It includes a rimless 12 mm ultra-clear glass aquarium, two ReefLED G2 60 lights, a fully hidden rear sump, MAX NANO protein skimming, dual 1550 LPH Sicce return pumps, two pump power centers, NanoMat-ready mechanical filtration, ReefATO+ readiness, and the expanded length needed for more natural fish movement, broader aquascapes, and more substantial coral placement.

Red Sea MAX NANO G2 XXL Aquarium System

• Largest MAX NANO G2 model: The XXL is the biggest member of the MAX NANO family, offering a 90 cm long display while keeping all primary filtration equipment hidden behind the aquarium.
• 200 litre / 53 gallon system volume: The larger water volume provides more stability, more livestock planning flexibility, and more room for coral growth than smaller all-in-one nano systems.
• Aquarium-only configuration: This version does not include a cabinet, making it suitable for customers who have a safe custom stand plan or need the aquarium for a built-in installation.
• Dual-light layout: Two ReefLED G2 60 fixtures provide more even coverage across the longer display than a single light would.
• Dual-pump circulation: Two 1550 LPH Sicce return pumps move water through the rear filtration system and return it to the display through two adjustable return nozzles.
• All-in-one without a visible sump: The rear-sump design keeps equipment concealed while avoiding the plumbing complexity of a traditional below-tank sump.

XXL Ultra-Clear Display and 90 cm Reef Canvas

• 12 mm rimless ultra-clear glass: Red Sea lists the XXL with 12 mm ultra-clear glass for a strong, premium, low-tint viewing experience.
• 90 cm display length: The longer aquarium creates a more natural reef layout, giving fish more horizontal movement space and corals more room to grow out.
• 53 gallon class presence: The XXL has the visual impact of a substantial reef display while maintaining the hidden-equipment simplicity of an all-in-one system.
• Better aquascaping options: The 90 x 55 x 50 cm display supports island structures, open channels, bommies, ledges, caves, and mixed coral zones with more breathing room than smaller MAX NANO models.
• Clean open-top design: The rimless format gives the aquarium a modern high-end look and provides excellent access for maintenance and coral placement.
• Hidden rear equipment: The rear sump and rotatable screen keep filtration equipment out of the display so the reef remains the focal point.

Dual ReefLED G2 60 Lighting

• Two ReefLED G2 60 fixtures: The MAX NANO G2 XXL includes two ReefBeat app-controlled ReefLED G2 60 lights for improved coverage across the 90 cm aquarium length.
• REEF-SPEC lighting: Each ReefLED G2 60 delivers coral-focused output adjustable from 10,000K reef-white to 23,000K REEF-SPEC Blue.
• Enhanced fluorescence: Violet, ultraviolet, and boosted 470 nm blue wavelengths help bring out coral fluorescence and fish colour.
• Dedicated moonlight channels: The lights include 3W moonlight channels for subtle nighttime viewing.
• ReefBeat app ecosystem: ReefBeat control supports schedules, acclimation, random clouds, lunar cycle moonlight, staggered sunrise and sunset, and manual custom modes.
• Rotatable mounting arms: The lighting mounts rotate upward for access during reefscaping, cleaning, and rear-sump service.
• Improved spread for a larger display: Dual lights help reduce dark zones and make the longer XXL layout more suitable for multiple coral islands and broader coral placement.

XXL Rear Sump Filtration and Skimming

• Fully hidden rear sump: The XXL keeps filtration and circulation hardware behind the display while maintaining easy access through the rotatable rear screen.
• Surface-skimming intake: Water flows into the rear sump through a removable surface skimmer to help remove surface film and support gas exchange.
• 225 micron filter sock: Mechanical filtration captures suspended particles before water continues to the protein skimmer and media chamber.
• MAX NANO protein skimmer: The integrated skimmer is built around Red Sea’s REEF-SPEC criteria and helps remove dissolved organics while oxygenating the water.
• High skimmer throughput: Red Sea describes the MAX NANO skimmer as passing the system volume through the skimmer approximately three times per hour with a 3 to 1 water-to-air ratio.
• Chemical media chamber: The rear sump includes a media area for carbon or other chemical filtration when the aquarium needs water polishing or targeted nutrient support.
• Bubble trap and dual returns: Water passes through the bubble trap before returning to the display through two multidirectional adjustable nozzles.

Dual Return Pumps and Upgrade-Ready Rear Sump

• 2 x 1550 LPH Sicce pumps: The XXL includes two 1550 LPH / 409 GPH Sicce return pumps for strong system turnover and balanced circulation across the longer display.
• Approximately 10x turnover: Red Sea lists the MAX NANO G2 circulation system as moving the tank’s entire water volume about ten times per hour.
• Two adjustable return nozzles: Dual multidirectional returns allow better flow targeting across the longer aquarium.
• NanoMat ready: The rear sump is prepared for optional Red Sea NanoMat automatic fleece-roll mechanical filtration.
• ReefATO+ ready: The XXL is ReefATO+ ready for optional advanced top-off, temperature monitoring, and leak detection.
• No included ATO reservoir: Red Sea notes that the automatic top-off reservoir included with smaller MAX NANO G2 models is not included in the MAX NANO G2 XXL.
• Two pump power centers: The XXL includes two power centers with convenient switches for easier control during feeding and maintenance.

Red Sea Max Nano G2 XXL Aquarium Specifications

• Total system water volume: 200 litres / 53 gallons.
• Display tank water volume: 169 litres / 45 gallons.
• Display dimensions: 90 cm L x 55 cm W x 50 cm H / 35.4 in x 21.7 in x 19.7 in.
• Total system height: 137 cm / 54 in excluding the light unit when installed with a matching cabinet.
• Glass: Rimless 12 mm ultra-clear glass.
• Lighting: 2 x Red Sea ReefLED G2 60 with ReefBeat app control.
• Return pumps: 2 x 1550 LPH / 409 GPH Sicce return pumps.
• Return nozzles: 2 x multidirectional adjustable return nozzles.
• Filtration: Rear sump with removable surface skimmer, 225 micron filter sock, MAX NANO protein skimmer, chemical media chamber, bubble trap, and dual returns.
• Auto top-off: Not included in the MAX NANO G2 XXL.
• Power centers: 2 pump power centers.
• Cabinet: Not included with this aquarium-only version.
• Upgrade readiness: NanoMat ready and ReefATO+ ready with optional accessories sold separately.

Application Notes for XXL Reef Planning

• Best use: Ideal for aquarists who want a larger all-in-one reef system with strong display presence and hidden rear filtration.
• Stand requirement: This aquarium-only version must be installed on a suitable aquarium stand or support structure designed for the filled system weight.
• Coral flexibility: The dual ReefLED G2 60 layout and longer display support more varied coral placement than smaller MAX NANO models.
• Flow planning: The dual return pumps provide strong turnover, but additional wavemaker flow may still be beneficial for coral-heavy or SPS-focused aquascapes.
• Top-off planning: Since the XXL does not include the smaller models’ ATO reservoir, evaporation management should be planned before setup.
• Not included: Cabinet, ATO reservoir, livestock, rock, sand, salt, heater, wavemaker, test kits, dosing equipment, optional NanoMat, optional ReefATO+, and additional filtration media are sold separately unless stated otherwise.

Red Sea MAX NANO G2 XXL Product Video

Setup and Installation Notes

• Use proper support: Install the aquarium only on a level stand or support structure rated for the filled system weight.
• Check level before filling: Confirm the aquarium is level before adding water, rock, or sand.
• Install the rear sump equipment: Confirm both return pumps, the filter sock, skimmer, media chamber, bubble trap, surface skimmer, and return nozzles are correctly installed before startup.
• Plan top-off equipment: The XXL does not include the smaller models’ ATO reservoir, so plan evaporation replacement before stocking the aquarium.
• Use RO/DI water: Use RO/DI water for salt mixing and top-off to support stable reef chemistry.
• Cycle before livestock: Establish biological filtration before adding fish or corals.
• Use lighting acclimation: Use ReefBeat acclimation settings when introducing new corals under the dual ReefLEDs.
• Maintain the rear sump: Clean mechanical filtration, service the skimmer, inspect both pumps, and keep the rear chamber clear for reliable flow.

What’s Included

• Red Sea MAX NANO G2 XXL rimless ultra-clear glass aquarium
• Integrated rear sump filtration system
• 2 x Red Sea ReefLED G2 60 lighting systems
• 2 x ReefLED mounting arms
• MAX NANO protein skimmer
• 2 x 1550 LPH / 409 GPH Sicce return pumps
• Removable surface skimmer
• 225 micron filter sock
• Chemical media chamber
• Bubble trap
• 2 x multidirectional adjustable return nozzles
• Rotatable rear sump screen
• 2 x pump power centers

Shipping Notes

• This item is exempt from our free shipping policy.
• To avoid delays, please order Red Sea aquariums by themselves. If you are wishing to order multiple things, please place two separate orders: one for the aquarium and one for the rest of your products.
• Please call for a shipping quote if ordering from NWT, YK, or NUN.
• All Red Sea aquariums are brought in and shipped out on an as-ordered basis. The average turn-around time to ship an aquarium to you is two business days, except where noted below.
• All shipments outside of the Vancouver area are shipped via trucking company with residential and power tailgate delivery, and are fully insured.
• Tanks ordered within BC and, in some circumstances, Alberta may take an extra 5-10 business days to process. Systems ordered from Alberta and east of there usually ship within two business days direct from the distributor in Ontario.
• If you are ordering for pick-up from our store, please select in-store pickup to avoid delivery charges. You will be notified when the tank arrives, usually within 5-10 business days.
• Red Sea Max S Series aquariums are always special order and will take from 3-6 weeks to ship.
• Please note the freight company is only responsible for getting the aquarium to the destination address and off-loading it. They are not responsible for carrying it inside.
• All freight charges have been greatly subsidized to help you get up and running with your new Red Sea system.