How Many Betta Fish Can You Put In A 75-Gallon Tank

How Many Betta Fish Can You Put In A 75-Gallon Tank

When it comes to keeping betta fish, one of the biggest factors to consider is the size of their tank. Betta fish, also known as Siamese fighting fish, require enough space to swim and establish their territory.

A 75-gallon tank offers a generous amount of space, but how many betta fish can you keep in it?

The general rule of thumb is to keep one betta fish per tank. However, in a 75-gallon tank, you have the opportunity to create multiple territories and add some tankmates.

So, let’s explore the possibilities and find out how to maximize the number of betta fish in your 75-gallon tank while ensuring their well-being.

Key Takeaways

Here’s a quick overview of what we’ll cover in this article:

  • One betta fish is generally recommended per tank, but a 75-gallon tank allows for multiple bettas and tankmates.
  • Male bettas should never be housed together in the same tank.
  • Female bettas can be kept in groups, but it’s important to have plenty of hiding spots.
  • When adding tankmates, choose peaceful and non-aggressive species.
  • Proper filtration, heating, and water quality are essential for the health of your bettas.

While it’s not advisable to keep male bettas together due to their aggressive nature, a 75-gallon tank allows you to create distinct territories for multiple betta fish.

Dividing the tank using aquarium dividers or creating separate areas with the use of plants and decorations will help prevent aggression and establish boundaries.

It’s crucial to ensure each betta fish has enough space and hiding spots to call their own. This will reduce stress and territorial disputes. Having separate territories will also help you monitor the health and behavior of each betta fish more effectively.

On the other hand, if you would like to keep multiple betta fish, you can consider introducing a sorority of female bettas in your 75-gallon tank.

Female bettas can coexist peacefully in groups, although it’s essential to create plenty of hiding places and space for each fish. A sorority of female bettas can create a lively and colorful tank display.

It’s important to note that even though female bettas are generally less aggressive than males, there can still be occasional conflicts. So it is crucial to closely monitor their behavior and be prepared to separate any bettas that show signs of aggression or distress.

In addition to having multiple betta fish, a 75-gallon tank allows you to include a variety of compatible tankmates. When selecting tankmates, it’s important to choose peaceful and non-aggressive species that won’t pose a threat to your bettas.

Here are some compatible tankmate options for a 75-gallon betta tank:

  1. Schooling Fish: Species like tetras, rasboras, and danios can be great additions to your tank. They add movement and color while staying peacefully in groups.
  2. Bottom-Dwelling Fish: Catfish and loaches are excellent options for the bottom of your tank. They help clean up any leftover food and add variety to the tank’s ecosystem.
  3. Shrimp and Snails: Amano shrimp and certain species of snails, like nerite snails, can coexist peacefully with betta fish. They assist in keeping the tank clean by consuming algae and debris.

Remember to research each species’ specific care requirements, including water temperature, pH levels, and compatibility with your bettas. It’s important to ensure all tankmates are well-acclimated to the tank and have similar habitat needs to minimize stress and potential conflicts.

Regardless of the number of betta fish and tankmates you decide to keep in your 75-gallon tank, proper care and maintenance are crucial for the health of your aquatic friends. Here are some essential tips to keep in mind:

  • Filtration: Invest in a quality filtration system that provides adequate water circulation and removes toxins. Regularly clean or replace the filter media to maintain optimal water quality.
  • Heating: Bettas require warm water with a constant temperature. Install a reliable aquarium heater and use a thermometer to monitor the water temperature consistently.
  • Water Quality: Test the water regularly for parameters such as ammonia, nitrite, nitrate, and pH. Perform regular water changes to maintain a stable and balanced environment.
  • Adequate Space: Even with multiple bettas and tankmates, ensure there’s ample swimming space. Avoid overcrowding to maintain good water quality and reduce stress.
  • Diet and Feeding: Provide a balanced and varied diet to meet the nutritional needs of your bettas and tankmates. Feed them appropriate portions and avoid overfeeding.

By following these guidelines and providing a suitable environment, you can enjoy a vibrant and thriving betta tank in your 75-gallon aquarium.

Remember, each betta fish has its personality, so observe their behavior and adjust accordingly to ensure the well-being of all your aquatic companions.


A 75-gallon tank offers exciting possibilities for housing multiple betta fish and tankmates. Whether you choose to create separate territories for individual bettas or establish a sorority of female bettas, it’s important to prioritize the well-being and happiness of your fish.

By providing adequate space, hiding spots, and compatible tankmates, you can create an enchanting underwater world right in your living room.

So go ahead and set up your 75-gallon betta tank, and enjoy the beauty and serenity it brings to your home.