Want to keep two stunning bettas without the risk of aggression? A dual betta tank lets you enjoy the beauty of both fish while keeping them safely separated. And if you’re dreaming of a system that supports plant growth and reduces water changes, download Aquaponics 4 You to learn how to create a stunning dual betta setup that’s self-cleaning and sustainable.
What Is a Dual Betta Tank?
A dual betta tank is a single aquarium divided into two secure compartments, allowing you to house two male bettas safely without fighting. Bettas are highly territorial, especially males, and a standard tank without a divider leads to stress or injury.
Why Use a Dual Betta Tank?
- Space-saving: House two bettas in a single aquarium footprint
- Safe separation: Prevents fighting while allowing each fish its own space
- Visual appeal: Create a mirrored or contrasting aquascape on each side
- Convenient maintenance: One filter and heater can serve both sides if properly designed
Top 6 Best Dual Betta Tanks in 2025
1. Aqueon Betta Falls Aquarium Kit
- Capacity: 3-sectioned system (~1.3 gallons per chamber)
- Best For: Beginners looking for a modern, compact design
This stylish waterfall-style tank features three cascading sections with frosted dividers that prevent flaring. It’s compact and beautiful for desktops, though each chamber is best suited for temporary or small bettas.
2. GloFish Betta Aquarium Kit
- Capacity: 3 gallons
- Best For: Colorful betta displays under blue LED light
This kit includes a divider, LED lights, and a filter, creating a glowing environment for your fish. It’s a fun option if you like bold visuals and minimal setup time.
3. Penn-Plax Water-World Radius Divided Betta Tank
- Capacity: 1.1 gallons per section
- Best For: Compact dual housing
Made with curved glass for a modern look, this tank includes a secure center divider and small filtration system. Great for limited spaces, though not ideal for long-term housing unless upgraded.
4. Life With Pets Clear Acrylic Betta Tank Divider (DIY)
- Best For: Custom setups in standard 10 or 20-gallon tanks
If you already own a 10 or 20-gallon tank, this durable acrylic divider lets you convert it into a dual or triple betta setup. It’s a cost-effective solution with more space and freedom for aquascaping.
5. Fluval Flex 15 with Divider Add-On
- Capacity: 15 gallons
- Best For: High-end setups with filtration and lighting control
This tank isn’t originally divided, but with a custom divider, it becomes a premium dual betta tank. The Fluval Flex features curved glass, multicolor LED lighting, and a powerful filtration system perfect for planted setups.
6. Zilla Aquatic Turtle Tank with Divider Hack
- Capacity: 10 gallons+
- Best For: DIY aquarists wanting lots of room
This shallow, wide tank gives plenty of swimming space and is easily modified with acrylic dividers. Excellent for creating a dual naturalistic betta habitat with floating plants and driftwood.
Mid-Article CTA: Want to Turn Your Betta Tank into a Garden?
Imagine a beautiful betta tank that grows herbs and greens using nothing but fish waste. That’s the magic of aquaponics. Aquaponics 4 You shows you how to create a thriving ecosystem where your bettas stay healthy, your plants stay fed, and your tank stays clean—almost on autopilot.
What to Look for in a Dual Betta Tank
1. Proper Divider
Ensure the divider prevents line-of-sight to reduce constant flaring, which causes stress. Opaque, frosted, or plant-lined dividers work best.
2. Sufficient Space
Each betta should have at least 2.5 gallons minimum. Bigger is always better for health, comfort, and water stability.
3. Good Filtration
Betta tanks need gentle, filtered water. Look for divided systems that support shared filtration, or use sponge filters on both sides.
4. Heating Compatibility
Bettas are tropical fish. A good dual tank setup should support a heater that evenly warms both compartments.
5. Customization
If you enjoy aquascaping, choose a tank with room for hardscape, plants, and substrate in both sections.
Common Mistakes When Setting Up a Dual Betta Tank
- Too small: Tanks under 1 gallon per side don’t support long-term health
- Clear divider: Constant visual contact causes stress and aggression
- No heater: Betta immune systems weaken below 76°F
- Unbalanced filtration: One side may collect more waste or stagnate
Can Female Bettas Be Housed Together?
Yes, but not in divided tanks like these. Female bettas can sometimes live in a sorority if the tank is large enough (20 gallons or more) and stocked carefully. Dual betta tanks are designed for separation—typically of male bettas.
Best Tank Mates for a Dual Betta Setup
Tank mates aren’t typically added to divided betta tanks unless each side is over 5 gallons. If you do, choose species like:
- Small snails (Nerite or Mystery Snails)
- Amano shrimp (only in well-planted tanks with cover)
- Live plants: Java fern, Anubias, Hornwort
Always monitor your betta’s behavior—some are tolerant, others may attack even harmless inverts.
Dual Betta Tank Setup Tips
- Install the divider before adding substrate or décor
- Use identical setups on both sides to reduce territorial behavior
- Add live plants for enrichment and natural filtration
- Use low-flow filters and sponge filters to reduce water movement
- Introduce bettas last, and monitor for signs of stress
Tank Divider Comparison Table
| Tank Type | Divider Type | Visibility Blocking | Customizable |
|---|---|---|---|
| Aqueon Betta Falls | Built-in, frosted | Yes | No |
| Life With Pets Divider | Opaque acrylic | Yes | Yes |
| Penn-Plax Radius | Built-in plastic | Partial | No |
| DIY 10-Gallon Tank | Acrylic or mesh | Yes (if modified) | Yes |
Conclusion: Safe, Stylish Homes for Two Bettas
A dual betta tank is the perfect solution for those who want to enjoy multiple bettas without risk. Whether you go with a ready-made kit or build your own setup using dividers, the key is space, safety, and stability. With the right care, both bettas can live peacefully and thrive in their side-by-side homes.
Final CTA: Ready to Build a Beautiful, Balanced Betta Habitat?
Why stop at safe when you can make it sustainable? Use your dual betta setup to grow plants, reduce maintenance, and create a living, breathing ecosystem. Download Aquaponics 4 You and get the step-by-step blueprint to build a natural tank that feeds your plants and protects your fish—no chemicals required.