36 Gallon Hexagon Fish Tank – A Master Guide To Creating A Stunning Vertical Aquascape
If you’ve ever looked at a standard rectangular aquarium and felt like something was missing, you aren’t alone. Many hobbyists eventually find themselves drawn to the unique, architectural geometry of a 36 gallon hexagon fish tank. It’s a bold choice that breaks the monotony of traditional setups, offering a stunning vertical display that acts as a living piece of art in any room.
But let’s be honest: while they look incredible, hexagonal tanks present a unique set of challenges that can intimidate even seasoned keepers. The depth can make maintenance tricky, and the footprint requires a thoughtful approach to stocking.
Don’t worry—this setup is perfect for hobbyists who want to master the art of vertical aquascaping. In this guide, we’ll walk through everything from filtration secrets to the best stocking choices to ensure your 36 gallon hexagon fish tank thrives for years to come.
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Understanding the Geometry: Why a 36 Gallon Hexagon Fish Tank is Unique
The most immediate appeal of this tank shape is its footprint. Because the tank is taller than it is wide, you save precious floor space while gaining significant vertical height. This is a game-changer for apartments or office desks.
However, the physics of a tall tank are different from a shallow one. Water surface area is limited in a hexagon, which directly impacts oxygen exchange. Because the surface is relatively small compared to the total volume, you need to be more vigilant about surface agitation.
When planning your 36 gallon hexagon fish tank, remember that gas exchange happens primarily at the surface. If you don’t have sufficient movement, your oxygen levels can drop, even if your filtration is technically rated for the volume.
Optimizing Filtration and Water Flow for Tall Aquariums
In a tall, narrow tank, water circulation can become stagnant near the bottom. If you rely on a standard hang-on-back (HOB) filter, the outflow might not reach the substrate, leading to dead zones where waste accumulates.
I highly recommend using a canister filter for this specific tank shape. The ability to use spray bars or adjustable nozzles allows you to direct flow toward the bottom corners of the tank, preventing detritus from settling in the gravel.
Keep an eye on your biological filtration as well. Because of the vertical depth, adding a small powerhead or an air stone near the bottom can help push waste toward your intake, ensuring that the water column remains pristine from top to bottom.
Aquascaping Your 36 Gallon Hexagon Fish Tank
Designing a vertical tank requires a different mindset. You aren’t just decorating the floor; you are building a skyscraper. To make the most of your 36 gallon hexagon fish tank, use vertical elements like tall driftwood branches or slate rock structures.
Look for “hardscape” materials that draw the eye upward. Manzanita wood is fantastic for this, as its intricate, spindly branches can reach from the substrate almost to the water line. This creates a natural ladder for your fish to explore.
When selecting plants, focus on species that love to climb. Vallisneria is a classic choice for the background, as it will grow long, ribbon-like leaves that sway in the current. For the middle, consider Anubias barteri attached to your driftwood to create a lush, multi-layered look.
Stocking Strategies for Vertical Environments
Stocking a 36-gallon tall tank is all about choosing fish that occupy different levels of the water column. You don’t want a tank where everyone is fighting for space in the same six inches of water.
For the bottom, consider a small group of Corydoras catfish. They are excellent cleaners and will happily patrol the substrate. For the mid-level, a school of Neon Tetras or Harlequin Rasboras adds constant motion and color.
The top layer is where a centerpiece fish shines. A pair of Honey Gouramis or a single Angelfish can work well, provided you keep up with your water changes. Remember, because the footprint is smaller, you should avoid overstocking; stick to the “one inch of fish per gallon” rule as a baseline, but prioritize the swimming needs of the species.
Maintenance Tips for Deep Tanks
The biggest challenge with a 36 gallon hexagon fish tank is the “arm reach” factor. Cleaning the bottom gravel or pruning plants in a deep, narrow tank can feel like performing surgery in a well.
Invest in a set of long-handled aquarium tools. A pair of long tweezers and a pair of spring-loaded scissors are non-negotiable if you want to keep your plants looking sharp without submerging your entire arm in the tank.
For water changes, make sure your gravel vacuum is long enough to reach the bottom corners. Since hexagonal tanks have corners, waste likes to hide there. Take your time during each maintenance session to reach those tight spots—it will go a long way in keeping your water parameters stable.
Common Problems and How to Solve Them
- Poor Surface Agitation: If you notice your fish gasping at the top, your surface flow is likely too weak. Adjust your filter outflow to create a ripple at the surface.
- Hard to Clean Corners: Use a sponge-on-a-stick or a magnetic glass cleaner designed for curved or angled glass to reach those tight corners.
- Lighting Penetration: Since the tank is deep, standard lights might not reach the substrate. Ensure your LED fixture has high PAR (Photosynthetically Active Radiation) values to keep your bottom-dwelling plants alive.
Frequently Asked Questions (FAQ)
Can I keep goldfish in a 36 gallon hexagon fish tank?
While 36 gallons is a decent size, goldfish produce a high amount of waste and prefer horizontal swimming space. I generally recommend tropical community fish for this tank shape instead.
What lighting is best for a deep hexagon tank?
Look for high-intensity LED lights that offer adjustable spectrums. Since light intensity decreases as it travels through water, you need a powerful light to ensure your foreground plants get enough energy.
Is it harder to cycle a hexagon tank?
No, the cycling process is the same as any other tank. However, because the surface area is smaller, be extra patient with your ammonia and nitrite testing before adding your first livestock.
Can I add shrimp to this setup?
Absolutely! Shrimp, like Cherry Shrimp or Amano Shrimp, love the vertical hardscape you’ll be creating. Just ensure your filter intake is covered with a sponge pre-filter so the shrimplets don’t get sucked in.
Conclusion
Keeping a 36 gallon hexagon fish tank is a rewarding experience that rewards patience and a bit of creative planning. By focusing on vertical aquascaping and ensuring your filtration matches the depth of your tank, you can create a thriving underwater world that stands out from the crowd.
Remember, the key to success is observation. Spend time watching how your fish interact with your hardscape, and don’t be afraid to adjust your layout if something isn’t working. You have the tools, the knowledge, and the passion—now it’s time to build your masterpiece!
Howard Parker
Founder & Author, AquiFarm
Howard Parker is a fishkeeping expert with over 20 years of experience. He is the founder and author of the Aquifarm located in Houston, TX 48. He has an academic degree in Agriculture Science. In addition to his professional pursuits, He is also an avid hobbyist of aqua pets, plants, and fish. Howard is dedicated to providing comprehensive information and resources for both novices and experienced fishkeepers, with a focus on professionalism and accuracy.