Red Sea Max Nano G2 Cube (13.5″ Front to Back) Polycarbonate Aquarium Screen Top Lid

If you own a Red Sea Max Nano G2 Cube, you already know the tank is built around a 13.5-inch front-to-back footprint — and that odd size makes finding a proper cover surprisingly frustrating. This custom-fit polycarbonate aquarium screen top lid solves that problem directly: it drops onto the rim, keeps fish and invertebrates where they belong, and lets heat, gas exchange, and light pass through with almost no interference. Canadian hobbyists can order aquarium supplies like this lid knowing it was measured specifically for the G2 Cube rather than adapted from a generic sheet.

Why the Max Nano G2 Cube Needs a Purpose-Built Lid

The Max Nano G2 Cube is an all-in-one system with a curved, rimmed top and a rear filtration chamber. Off-the-shelf glass canopies rarely sit flush on it, and homemade mesh frames often sag or leave gaps along the front edge. A lid built to the exact 13.5-inch depth closes those gaps cleanly.

Open-top reef tanks look beautiful, but they invite evaporation, salt creep, and airborne dust. They also give jumpers like wrasses, gobies, and firefish an easy exit. A screen top addresses all three issues without turning your display into a sealed box that traps heat and CO₂.

Mesh Screen vs. Solid Glass: The Key Difference

Solid glass and acrylic covers hold humidity in and can raise water temperature under strong reef lighting. They also block some light and collect condensation that dulls output. A screen lid takes the opposite approach.

• Gas exchange stays open. Oxygen and CO₂ move freely, which supports stable pH.
• Heat escapes. Evaporation cooling continues to work as designed.
• Light passes through. Reef LEDs reach corals with minimal loss.
• Jumpers stay in. Fish and shrimp are contained by the mesh.

The trade-off is faster evaporation than a sealed top, so top-off water use goes up slightly. For most reef keepers, that is a fair exchange for better gas exchange and cooler running temperatures.

Built for the Max Nano G2 Cube’s Exact Dimensions

Fit is everything with a lid. This screen top is cut for the G2 Cube’s 13.5-inch front-to-back measurement and its corresponding width, so it rests on the tank rim rather than floating above it or resting on the glass.

Materials That Hold Up in Saltwater

Polycarbonate is the frame material here, and that choice matters in a marine environment. Unlike some brittle plastics, polycarbonate resists cracking from knocks and handles the humidity and salt spray that come with reef keeping.

The mesh is fine enough to stop small fish while still letting air and light through. Aluminum or plastic framing is common in this category; polycarbonate brings a lighter weight and better impact resistance, which helps when you are lifting the lid for feeding or maintenance.

Feeding and Maintenance Access

A lid that has to come off entirely every time you feed is a lid you will start to resent. This design allows you to lift, slide, or remove the panel without dismantling your lighting mount. That matters because you will access the tank daily.

For anyone building out a full system, pairing this lid with other aquarium accessories for sale — like magnetic cleaners, test kits, and dosing tools — keeps maintenance simple and consistent.

Who This Aquarium Screen Top Lid Is For

This lid suits a specific owner: someone running a Red Sea Max Nano G2 Cube who wants jumper protection without sacrificing light or airflow. If that is you, the fit and function line up.

Reef Keepers and Nano Tank Owners

Nano reef tanks are popular in Canada because they fit apartments, condos, and small home offices. The Max Nano G2 Cube is a self-contained system, and a matching lid keeps it looking finished while protecting livestock.

Beginners Starting Their First Marine Tank

If you are new to saltwater, an aquarium starter kit for sale approach makes sense — tank, lid, and basics together. A fitted screen top removes one variable from the learning curve. You will not have to guess whether a generic cover fits or improvise a mesh frame on a weekend.

Anyone Tired of Losing Fish to the Floor

Few things sting like finding a healthy fish dried out beside the tank. Jumping is common in reef species, and an open top is an open invitation. A screen lid is one of the cheapest forms of insurance in the hobby.

What to Expect When You Order Aquarium Supplies Online in Canada

Buying aquarium equipment online has become the norm, and for good reason. You get a wider selection than most local stores stock for a niche tank like the G2 Cube, and you can compare specs before you commit.

Shipping Across Canada

Canadian buyers should confirm shipping coverage to their province and check whether the seller handles cross-border logistics or ships domestically. Domestic shipping usually means shorter transit times and fewer customs surprises.

What to Check Before You Buy

Verify the measurements against your own tank before ordering. Confirm the listing states 13.5 inches front to back and matches your G2 Cube generation. Red Sea has revised its Nano line over the years, so exact-generation fit matters.

Check the return policy too. Even a well-made lid can arrive with a bent frame from rough handling, and a clear return path protects you.

Care and Compatibility Notes

Polycarbonate is durable, but it is not indestructible. Clean it with a soft cloth and fresh water rather than abrasive pads or harsh solvents, which can cloud the surface over time. Rinse off salt residue periodically to keep the mesh clear.

The lid works alongside most aftermarket LED mounts, though very low-profile arms may need slight adjustment. If you run a protein skimmer or reactor in the rear chamber, confirm the lid does not block the cup or tubing.

For a broader look at compatible gear, browse the full aquarium supplies online store selection to match your build.

Frequently Asked Questions

Will this lid fit every Red Sea Max Nano G2 Cube?

It is cut for the G2 Cube’s 13.5-inch front-to-back footprint. Measure your own tank before ordering, since Red Sea has offered different Nano configurations over the years.

Does a screen top reduce light for corals?

Only marginally. Mesh blocks far less light than solid glass or acrylic, so reef LEDs still reach corals effectively. That is a major reason reefers choose screen tops over sealed covers.

Will a lid raise my tank temperature?

A screen top actually helps keep temperatures down by allowing heat to escape through evaporation. Sealed glass lids are the ones that tend to trap heat.

How much extra evaporation should I expect?

More than with a sealed top, because airflow is intentional. Expect to top off more often, especially in dry Canadian winter air. An auto top-off unit handles this easily.

Can I still feed and clean without removing the whole lid?

Yes. The design allows access for daily feeding and routine maintenance without a full teardown.

Is this a good fit for a beginner’s first saltwater tank?

Absolutely. It removes the guesswork of a homemade lid and protects livestock from day one, which is a real benefit when you are still learning the ropes.