Ember tetras and betta make excellent tankmates, especially if you’re looking to set up a bright and colorful aquarium. Ember tetras are fiery red to orange, while bettas occur in various color patterns. You can match the color of fish to the theme of your home or office. But can ember tetras live with betta fish safely?

Ember tetra and betta fish can live together because they thrive in similar water conditions and feed on about the same diet. Although betta fish are aggressive and territorial, add plant decorations to the aquarium to relax and slow them down. Substrates will help reduce their fin nipping behavior and keep them together.

I’ve discussed the care you need to provide your ember tetra and betta fish living together to ensure they enjoy a lifespan between 2 and 5 years in your aquarium.  

Can ember tetras live with betta fish?

Ember tetras are small and peaceful fish, while betta fish are very territorial, but they will live happily without putting each other under too much stress. Bettas are surface dwellers, while ember tetras are middle dwellers. Ember tetras like to keep their own space and swim freely. Keep six ember tetras and one betta fish in a long (not tall) 15-gallon tank. 

Here are the care and requirements to keep ember tetras and betta fish together:

Ensure water temperature is 74°F – 82°F, and a pH of 6 – 7.5

Ember tetras need aquarium water temperatures between 74°F – 82°F, and a pH of 6 – 7. They can tolerate a range of water conditions, making them tankmates with various freshwater fish such as bettas, which prefer a temperature of 75°F–80°F and a pH of 6.8-7.5. 

The pH and temperature conditions overlap. That’s why ember tetras can acclimatize and get used to the temperature and pH of betta fish. 

Ember fish are omnivores; bettas are carnivores

Ember tetras and bettas have different diet requirements, but ember tetras can accommodate bettas’ diet. 

Ember tetras are omnivores, meaning they feed on meaty food and plants, while betta fish are carnivores, meaning they feed only on flesh. 

If you keep ember fish and bettas together, give them fleshy food and vegetables once or twice a day. For example, drop some live worms, brine shrimp, flakes, and frozen fish food inside the aquarium.

Aquarium decorations and substrate

In an aquarium with ember tetras and betta fish, plant decorations are essential. Both live and artificial plants provide good hiding places for the fish. Add plenty of foreground and midground aquarium plants to keep bettas and ember tetras from conflicting.

Here’s a list of good plants for betta fish to choose from.

Decorating your aquarium with Java moss, Java fern, or Duckweed reduces the chances of the tetras and betta seeing each other often. The less the fish see each other, the lower the chances of fighting. 

Most importantly, the plants are essential carbon sinkers and improve water quality by absorbing CO2 and other heavy metals that would otherwise kill your ember tetras and betta fish.  

Minimum tank size for keeping ember tetra with betta fish

The minimum tank size for keeping ember tetras with betta fish is 15 gallons. A 15-gallon fish tank should accommodate one betta and six ember tetras. 

You can use much larger tanks if you want to keep much fish. Although they have small body sizes, ember tetras and betta fish are active swimmers. Therefore, they need a lot of free space.

A larger tank also reduces fin nipping and accommodates both fish. It means fewer fish fights, injuries, or stress in the aquarium. 

Tank size for ember tetras with bettas

The tank size is crucial when keeping any kind of fish. Choosing the correct tank size is good for the health and happiness of your ember tetras and bettas. 

A small and overcrowded tank can lead to fish diseases, insufficient oxygen, and other complications for ember tetras and betta fish.

Here are some fish tank sizes and the correct number of ember tetras and bettas to keep in each:

5-gallon tank

A 5-gallon tank is too small for ember tetras and betta fish. You can only keep one fish species inside a five-gallon tank. Choose to keep one betta fish or three ember tetras. 

Otherwise, a 5-gallon tank cannot provide sufficient oxygen, space for plants, and swimming space for the fish. I don’t recommend a 5-gallon tank size if you want to keep ember tetras and betta together.

15-gallon tank

A 15-gallon tank is the minimum tank size for keeping betta fish and ember tetras together. A 15-gallon tank can accommodate one betta fish and up to six ember tetras. The tank should be long to provide a large surface area for the fish. 

Bettas are usually surface feeders; they swim, dwell, and sometimes breathe at the tank’s surface. On the other hand, ember tetras are middle-tank dwellers. They are also active swimmers who love playing in the aquarium. 

25-gallon tank 

Adult ember tetras grow approximately an inch. You will not necessarily need a bigger tank unless you are breeding them. A 25-gallon tank is big enough to keep a single betta fish and up to 15 ember tetras. 

The tank is also spacious enough to accommodate live or artificial decorative plants and substrates. Your betta fish and ember tetras will have more feeding, hiding, and breeding spaces inside a 25-gallon fish tank.

35-gallon tank

It is good to keep one betta fish with a school of ember tetras. Keep one betta and up to 25 ember tetras in a 35-gallon fish tank. 

Keeping many bettas can be hectic regarding care and requirements for the fish because they can become excessively territorial with the ember tetras. 

A 35-gallon tank also allows you to add plants, rocks, and pebbles inside your aquarium without any significant impact on the fish.

55-gallon 

A 55-gallon tank is large, heavy, and can accommodate one betta fish and close to 45 ember tetras.  Because it is heavy, a 55-gallon fish tank requires proper handling. 

A support structure is necessary to keep the tank in a permanent position. In addition, keep the tank in a suitable location with less traffic to avoid stressing the fish. 

A summary of ember tetra and betta fish tank size and number of fish to be kept inside.

Tank size in gallons	Number of tetra and betta
5	Too small to keep both fish
15	1 betta, 6 ember tetras
25	1 betta, 15 ember tetras
35	1 betta, 25 ember tetras
55	1 betta, 45 ember tetras

Will ember tetras nip betta?

Ember tetras have small bodies that make them less aggressive. It is rare for ember tetras to nip bettas. When you find ember tetras nipping, something might not be right. Perhaps your tank is overcrowded, or the fish are starving.

Ember tetras are not carnivores. They might start nipping the betta fish out of shyness and for self-defense, but not necessarily for food. That happens especially when ember tetras are fewer than betta fish in the aquarium.

To discourage fin nipping, increase the number of ember tetras in the tank. That will increase their confidence, and they will not shy away from the betta fish or feel the urge for defense.

How to introduce ember tetras into a betta tank

It is quite easy to cause tension and stress to your fish if you do not take great care when introducing embers into a betta tank. Here are guidelines for introducing ember tetras safely into a betta tank:

• Keep the ember tetras in quarantine for 2-3 weeks. It enables you to observe their behavior. If they are sick, treat them first and ensure they are healthy before putting them in the main tank with your bettas.
• Ensure the water used in the quarantine tank is similar to the water in the main tank. These will familiarize the ember tetras with the water they will live in. 
• Ensure the tank has enough plant decorations and logs. To accommodate the fish and the decorations, use a 25-gallon tank to provide the most suitable environment.
• Observe the ember tetras and betta fish behavior every day for a month and see if they have adapted to each other and if they are living peacefully.

Care for bettas and ember tetras

Ember tetras and bettas can live together in the same tank. When kept together, caring for them is not very difficult. Here is how to care for ember tetras and betta fish as tank mates.

• Use a minimum tank size of 15 gallons to keep bettas and ember tetras. You might want to consider other factors when determining the tank size for a betta sorority.
• Ensure the aquarium temperature is 74°F – 82°F and a pH of 6 – 7.5.
• Feed the fish once a day to avoid overfeeding. Feed bettas with meat and the ember tetras with both flesh and vegetables. 
• Clean the tank weekly and remove food leftovers to avoid toxins buildup.
• Change 50% of the aquarium water once every two weeks
• Clean the plants and other decorations inside your tank weekly to keep them clean and free from germs. 
• Ensure your aquarium decorations and substrates do not have sharp edges that might injure the fish.

References 

Carter, K. (2020). Betta Fish Care in a Community Tank. Betta Fish Rescue Organization.