Why Is My Betta Fish Not Growing?

Many people who buy Bettas are surprised to find them still small after a few weeks. This is because they are not growing, and that is really sad! To help you out, we will go over some of the most common reasons for a betta fish not to be growing and how you can fix the issue.

Why Is My Betta Fish Not Growing?

Your betta fish is not growing because it is not getting enough nutrients. Bettas are carnivorous fish, so they need a lot of protein in their diet to help them grow quickly and stay healthy.

To stop this from happening, make sure to feed them high-quality food at least twice a day. This will ensure that they are getting the nutrients they need to grow.

If you are having trouble finding high-quality food for your betta, ask a pet store employee for help. They will be able to point you in the right direction and recommend some good brands of food to try.

Another reason why your betta fish may not be growing is because of the size and type of their tank. Bettas need at least one gallon of water to live in comfortably, so if you do not have that for them then they will not grow as quickly or be as healthy.

Also, make sure that there is nothing inside your betta’s habitat like decorations with sharp edges or rough surfaces because this can hurt them and prevent your fish from growing.

How Can I Make My Betta Fish Grow Bigger?

If you are looking for ways to make your betta fish grow bigger, there are a few things that you can do:

1. Feed more often

As we mentioned before, Bettas need a lot of protein in their diet to grow properly. By feeding them more often, you can make sure that they are getting all the nutrients they need.

I recommend feeding them twice a day, morning and night. This will help ensure that they are getting the food they need to grow and stay healthy.

If your betta isn’t eating, then try feeding them a different type of food. Some Bettas prefer live food, while others do better with pellets or flakes. Experiment until you find something that your fish likes and stick to it.

It’s also possible that your betta has constipation, which means the poop is stuck in their intestines and won’t come out. If you think this may be the case, then take your fish to a vet for treatment.

Be careful with how much food you give though… too much can also be harmful as it can cause constipation and your fish to become sick. It’s a balancing act, but you’ll get the hang of it after a while.

2. Feed with high-quality food

As we also mentioned before, it is important to make sure that your betta fish are eating high-quality food. This will ensure that they are getting the nutrients they need to grow big and healthy.

You can also supplement their pellet diet with other foods, like live or frozen bloodworms. This will give them even more of the nutrients they need to grow big and strong.

3. Give them more space to grow

If you have a small tank, then your betta fish will not be able to grow as big as they would in a larger tank. This is because they need more space to swim and move around.

To make sure that your betta can grow to its full potential, try upgrading to a bigger tank. You can find tanks of all shapes and sizes at any pet store or online.

How Long Do Baby Bettas Take to Grow?

Baby bettas usually take about 7 months to grow into their adult size, which is when they are considered mature. During this time, it is important to make sure that they are getting enough food and nutrients so that they can grow up big and strong.

The key is to give them a healthy environment to live in and plenty of food to eat. By doing this, you can help them grow into the beautiful fish that they should be! Be patient during this time and you will be rewarded with a healthy and happy betta fish.

Most betta fish that are sold in pet stores are between 7 and 12 months old, which means your betta should be fully grown before you bring it home from the store. You should consult with the pet store if the betta fish appear small.


In conclusion, there are a few things you can do to make your betta fish grow bigger. Feed them more often, with high-quality food, and give them enough space to grow. This is how to make your betta fish happy and healthy.

If you follow these tips, then your betta will be on its way to growing into a big and healthy fish! Thank you for reading.