55 Gallon Hexagon Fish Tank Lid – The Ultimate Guide To Finding, Customizing Lids

Finding the right parts for a unique aquarium shape can feel like a daunting scavenger hunt.

If you are currently searching for a 55 gallon hexagon fish tank lid, you already know that these tall, elegant tanks offer a stunning vertical view but present specific challenges when it comes to standard equipment.

Don’t worry—this setup is perfect for beginners and seasoned pros alike once you understand the dimensions.

In this guide, I will show you exactly how to measure, source, or even build a custom cover that keeps your fish safe and your water crystal clear.

We will dive into the best materials for durability, how to manage evaporation, and the secrets to fitting modern lighting onto a hexagonal footprint.

Why Your 55 Gallon Hexagon Fish Tank Lid Matters More Than You Think

The primary purpose of any aquarium cover is to create a stable environment for your aquatic life.

For a hexagon tank, which has a smaller surface area relative to its height, a high-quality 55 gallon hexagon fish tank lid is essential for gas exchange and temperature regulation.

Without a proper lid, you risk losing your favorite fish to “jumping accidents,” especially with active species like Rainbowfish or Hatchetfish.

Additionally, a lid significantly reduces the rate of evaporation, which is crucial for maintaining stable water parameters and salinity levels in brackish setups.

It also acts as a barrier against dust, pet hair, and household chemicals that could otherwise contaminate your water column.

Understanding the Dimensions of a 55-Gallon Hexagon

Before you go shopping, you must realize that not all 55-gallon hexagons are created equal.

Most standard 55-gallon hex tanks stand about 24 to 28 inches tall, but the width across the flats can vary by manufacturer.

Common brands like Oceanic, Aqueon, and Marineland often have slightly different rim thicknesses.

To find a matching 55 gallon hexagon fish tank lid, you need to measure from one flat edge to the opposite flat edge, as well as the length of a single side.

Always measure the inside lip of the tank frame where the lid will actually sit, rather than the outermost edge.

If your tank is vintage, the plastic trim might have warped slightly over time, so taking measurements at multiple points is a smart move.

Different Types of Lids for Hexagonal Aquariums

When it comes to covering a six-sided tank, you generally have three main options: glass canopies, plastic hoods, or DIY screens.

Glass Canopies

Glass is often the preferred choice for serious hobbyists because it doesn’t warp and offers excellent light penetration.

A glass 55 gallon hexagon fish tank lid usually consists of two triangular or trapezoidal pieces joined by a flexible plastic hinge.

This design allows you to open the front half for feeding without removing the entire structure.

Plastic Hoods

Plastic hoods are often sold as “all-in-one” kits and usually include built-in lighting fixtures.

While convenient, they can be harder to find as stand-alone replacements for older 55-gallon hexagon models.

They are great for beginners because they hide the internal equipment, but they can restrict your ability to upgrade to high-intensity LED lighting later.

Mesh and Screen Covers

If you are keeping high-oxygen species or using powerful pendant lights that generate heat, a mesh screen might be your best bet.

Screen lids allow for maximum gas exchange and cooling, though they do nothing to prevent evaporation.

How to Source a Replacement 55 Gallon Hexagon Fish Tank Lid

Finding an off-the-shelf replacement can be tricky because hexagon tanks are less common than rectangular ones.

Your first stop should be the manufacturer’s website if you can identify the brand of your aquarium.

If the tank is an older model, check specialized online retailers or local fish stores that specialize in “new old stock.”

Sometimes, you can find a 55 gallon hexagon fish tank lid through custom aquarium builders who can cut glass to your exact specifications.

Don’t forget to check hobbyist forums and local classifieds; many people sell the lids separately when their tanks are decommissioned.

If you find a lid that is slightly too large, some glass shops can trim it down for a small fee, provided it isn’t tempered glass.

The DIY Route: Making Your Own Custom Lid

If you cannot find a commercial lid that fits, building your own is a rewarding and relatively simple weekend project.

The most common material for a DIY 55 gallon hexagon fish tank lid is 1/4-inch polycarbonate or “Lexan.”

Unlike acrylic, polycarbonate is much less likely to bow or warp when exposed to the high humidity and heat of an aquarium.

Step 1: Create a Template

Use a piece of cardboard to trace the exact inner dimensions of your tank’s rim.

Cut out the cardboard and test the fit, ensuring there is a small gap for cords and airline tubing.

Step 2: Cutting the Material

Once your template is perfect, trace it onto your polycarbonate sheet.

Use a jigsaw with a fine-toothed blade or a table saw to cut the shape out carefully.

Step 3: Sanding and Finishing

Smooth the edges with 220-grit sandpaper to prevent any sharp edges from scratching you or your tank.

You can even add a small “finger hole” or a plastic handle for easy lifting during maintenance sessions.

Managing Lighting and Ventilation

The shape of a hexagon tank means that light has a long way to travel to reach the bottom.

When choosing a 55 gallon hexagon fish tank lid, consider how it will interact with your light source.

If you use a glass lid, ensure it is kept clean of salt creep and calcium deposits, as these will block essential PAR (Photosynthetically Active Radiation).

For planted tanks, you might want a lid that allows for a “center-mount” light to ensure even coverage across all six corners.

Ventilation is also key; if your lid fits too tightly, you may see excessive condensation or a rise in water temperature during summer.

Adding a small 1/2-inch gap at the back of the lid can provide enough airflow to keep the water oxygenated and the temperature stable.

Maintenance Tips for a Long-Lasting Lid

To keep your 55 gallon hexagon fish tank lid looking new, you should incorporate it into your weekly cleaning routine.

Wipe down the underside of the lid with a mix of white vinegar and water to dissolve mineral buildup.

Never use glass cleaners like Windex, as the ammonia fumes can be toxic to your fish if they seep into the water.

If you have a glass hinge, check it periodically for cracks or signs of fatigue, as these can fail over time.

For plastic hoods, ensure that the vents are clear of dust to prevent the built-in electronics from overheating.

A well-maintained lid not only looks better but also ensures that your lighting remains efficient and your fish stay safely inside.

Frequently Asked Questions (FAQ)

Can I use acrylic for my 55 gallon hexagon fish tank lid?

While you can use acrylic, it is prone to warping over time due to the moisture on one side and the heat from lights on the other.

Polycarbonate is a much better DIY choice because it stays flat even in high-humidity environments.

Where can I buy a replacement hinge for a hexagon glass top?

Most aquarium hinges are universal and can be bought in 6-foot strips that you can cut to size with a utility knife.

Look for “aquarium canopy hinges” at online retailers or specialized aquarium supply stores.

How do I stop my lid from vibrating?

If your air pump or filter is causing the lid to rattle, try placing small silicone bumpers or “dots” on the corners of the tank rim.

This creates a soft cushion that absorbs the vibration and keeps your living room quiet.

Will a lid help with my aquarium’s water temperature?

Yes, a lid acts as an insulator. It helps retain heat in the winter, which can save money on your electricity bill by making the heater work less.

In the summer, however, you may need to prop the lid open slightly to allow heat to escape.

Does a lid block UV light for my plants?

Standard glass and plastic will block some UV, but most aquatic plants rely on the visible light spectrum (PAR).

As long as your 55 gallon hexagon fish tank lid is clean and clear, your plants should thrive without issue.

Conclusion: Protecting Your Aquatic Investment

Securing a proper 55 gallon hexagon fish tank lid is one of the best things you can do for the longevity of your aquarium.

Whether you choose a sleek glass canopy, a functional plastic hood, or a custom-built polycarbonate cover, the benefits are undeniable.

You will enjoy less evaporation, more stable temperatures, and the peace of mind that comes with knowing your fish won’t jump out.

Remember to measure twice, clean regularly, and choose materials that can withstand the unique environment of a tropical tank.

Your 55-gallon hexagon is a beautiful centerpiece—make sure it stays that way with the perfect finishing touch!

Happy fish keeping, and may your hexagonal haven flourish for years to come!