Red Sea Reefer 900 G1 and G2+ Custom Polycarbonate Aquarium Screen Top Lid

Your Red Sea Reefer 900 deserves a lid that fits like it was made for it. This custom polycarbonate aquarium screen top lid is cut to order for both the Reefer 900 G1 and G2+ systems, so you get clean edges, tight tolerances, and no awkward gaps around the overflow or plumbing. If you have been searching for a Red Sea Reefer 900 G1 and G2+ custom polycarbonate aquarium screen top lid that actually matches your tank footprint, this is built for exactly that job.

Ordering is simple: confirm your model and mesh preference, and the frame arrives ready to assemble with clear instructions. It keeps jumpers in, cuts evaporation, and lets heat and gas exchange escape the way an open top should. Available through our aquarium supplies online store, it ships across Canada to hobbyists who want a proper fit instead of a compromise.

Why a Custom Screen Top Beats a Universal Lid

Reef tanks are open systems by design. A solid glass or acrylic lid traps heat, cuts gas exchange, and forces you to fight condensation all summer. A mesh screen top solves the practical problems while keeping the reef look you paid for.

The Reefer 900 has specific geometry — a wide display, a rear overflow, and plumbing that intrudes into the rim. A universal lid either sits crooked or leaves gaps at the corners where fish get through. A custom-cut frame follows the actual perimeter, so you get a flush sit with no dead zones.

Jump Protection Without the Heat Penalty

Wrasses, firefish, and gobies are notorious jumpers, and screens stop them cold. Because the mesh is open, air still moves freely at the surface. That means stable pH, efficient oxygen exchange, and less reliance on a chiller.

Reduced Evaporation and Top-Off Demand

An open tank loses a surprising amount of water to evaporation, especially in a dry Canadian winter with the furnace running. A screen top slows that loss. You top off less often, your salinity swings less, and your ATO reservoir lasts longer between refills.

Built for the Reefer 900 G1 and G2+ Platform

This is not a generic rectangle with a screen stapled on. The frame is cut to the Reefer 900 footprint and accounts for the rear chamber and overflow section. Whether you run the original G1 chassis or the updated G2+, the outline is set to your specific model.

Polycarbonate was chosen deliberately. It resists warping and holds its shape better than many thinner plastics when exposed to humid tank air and lighting heat. The frame also tolerates the occasional splash without turning brittle.

Mesh Options for Different Reefing Goals

Standard screening handles jump protection and light penetration for most mixed reefs. If you run high-output lighting and want to soften intensity slightly, a finer mesh does that while still breathing. Tell us what you keep, and we will point you to the right weave.

Fits Around Real Plumbing, Not Ideal Plumbing

Return lines, drain pipes, and cable runs all create edges a template has to respect. Because every lid is cut per order, you are not forced to drill your own holes or trim the frame with a utility knife. It arrives ready to build.

What’s Included and How Assembly Works

Each kit ships as a frame and mesh set with spline and a cutting tool. Assembly takes most people under half an hour with no special skills. The frame pieces join at the corners, the spline presses the mesh into the channel, and you trim the excess.

Tools You Already Have

You need a flat surface and a few minutes. No drilling, no silicone, no measuring tape gymnastics. The frame is pre-sized, so the work is assembly rather than fabrication.

Placement on the Tank

The lid rests on the rim rather than clamping down. That makes feeding, coral placement, and equipment adjustments quick — lift it off, work, set it back. It also means cleaning is straightforward: rinse the mesh, wipe the frame, done.

Materials, Build Quality, and Long-Term Care

Polycarbonate frames are lightweight, which matters when you are lifting a lid over a lit reef several times a week. They also resist the yellowing that cheap acrylic sometimes shows over time under strong lighting.

The mesh is the wear item. Rinse it periodically to clear salt creep and dust, and it will keep passing air and light for years. If a panel ever tears, replacement mesh is inexpensive and easy to swap.

Salt Creep and Cleaning

Salt spray builds up on any tank cover. A quick freshwater rinse every few weeks keeps the screen clear and prevents mineral crust from blocking light. Avoid abrasive pads on the frame — a soft cloth is enough.

When a Screen Top Isn’t the Right Call

If your priority is maximum humidity retention for a terrarium-style setup, a screen top is the wrong tool. It is designed for reef and fish systems that need gas exchange. Similarly, if you run a rimless tank with no ledge, confirm your mounting approach before ordering.

Why Buy From a Canadian Reef Supplier

Shipping matters more than most hobbyists expect. Cross-border orders can sit in customs, arrive with brokerage surprises, and take longer than the tracking suggests. Ordering domestically keeps timelines predictable and support local — you can ask questions and get answers from people who run the same tanks.

We stock the aquarium accessories for sale that Canadian reefers actually use, from lids and mesh to maintenance basics. If you are building out a system from scratch, you can order aquarium supplies and pair the lid with the consumables you will need anyway.

Support That Understands Your Tank

Questions about model fit, mesh choice, or whether the lid clears your light mount are fair game. A supplier who reef-keeps will give you a straight answer rather than a generic reply. That is the difference between buying a part and getting the right part.

Pairing the Lid With the Rest of Your Setup

A lid is one piece of a working system. Most Reefer 900 owners are also managing top-off water, testing, and media. Buying these together saves on shipping and keeps your routine consistent.

Top-Off and Evaporation Control

With evaporation reduced, your ATO cycles less. That extends pump life and lowers the chance of a dry-run. Pair the lid with a reliable top-off reservoir and you have a stable salinity picture week to week.

Lighting and Mounting Considerations

Check how your lights mount before final placement. Most arm and rail mounts clear a low-profile screen frame. If you run a hanging kit, the lid sits below it without conflict.

Maintenance Consumables Worth Bundling

Salt, test kits, filter media, and algae scrapers are the items you replace constantly. Bundling them with your lid order is a practical way to buy fish tank accessories without paying shipping twice.

Frequently Asked Questions

Does this lid fit both the Reefer 900 G1 and G2+?

Yes. The outline is cut for the Reefer 900 platform, and you select your specific model at checkout so the frame matches your tank’s rear section and plumbing layout.

Will a screen top raise my tank temperature?

No, it does the opposite compared to a solid lid. Mesh allows heat to escape and gas exchange to continue, which helps keep temperature and pH stable.

Is assembly difficult?

Most buyers finish assembly in under 30 minutes using the included spline and cutting tool. No drilling or silicone is required.

Can I use it with high-output reef lighting?

Yes. Choose a mesh weave that suits your light intensity. Standard mesh preserves most output, while finer mesh slightly diffuses it.

How do I clean the lid?

Rinse the mesh and frame with freshwater every few weeks to remove salt creep and dust. A soft cloth is enough for the frame.

Do you ship across Canada?

Yes. Orders ship domestically, which keeps delivery times predictable and avoids cross-border customs delays.