How to treat a constipated Betta fish?

In this post, we will answer the question “How to treat a constipated Betta fish?”. We will also discuss the main reasons a Betta fish get constipated and its symptoms.

How to treat a constipated Betta fish?

In general, constipated Betta fish will be required to fast for at least 24 hours. After fasting, you may offer your Betta fish some fibre-rich items, such as sweet potatoes, peas, and algae-based flakes. However, the 24 hours of fasting are crucial before offering any food item. This is because if you feed them right away, constipation may even worse.

Constipation is a condition that affects the digestive system. 

Constipation is characterized by difficulty in passing feces. Most of the time, it is caused by hardened feces, which can be produced by a variety of factors. If you suspect that your Betta fish is suffering from constipation, there are a variety of signs you may look for as well as underlying problems that you will need to address. 

In Betta fish, what is the source of constipation? 

Finding out what is causing your betta’s constipation is one of the most important things you can do before treating it. If you don’t, you’ll only end up repeating the therapy over and over again. Here are some of the most prevalent reasons for constipation in Betta fish, listed in no particular order.

Fibre-poor diet

When a Betta fish does not have enough fibre in its diet, they are going to become constipated. Betta fish are prone to constipation for a variety of reasons, one of which is that they ingest animal protein. 

Despite the fact that they are opportunistic feeders that would eat anything that fits in their jaws, they mostly prefer meat. One of the first things you must ensure is that you are providing them with the proper nutrition and a well-balanced diet. 

Providing insufficient live food 

You should also make sure your Betta fish is eating enough whole and live things. While pellets include several essential minerals, they lack important necessities. For example, they don’t have a lot of fibre. Carnivorous fish need to eat other animals because the contents of their prey’s stomach provide them with some fibre. 

Their skeletons are made out of chitin, a fibrous substance. Your Betta fish will obtain enough fibre thanks to the combination of stomach contents and chitin-rich skeletons. This substance is notably abundant in Daphnia and mosquito larvae.

Offering too much bloodworm

Contrary to popular belief, bloodworms should not be a staple part of your betta fish’s diet, but instead, they can become a threat. Despite the fact that they have a high concentration of nutrients, their regular ingestion will do more damage than benefit. Bloodworms should be used sparingly when there are far superior options available, like Daphnia, which provides far more nutrition to your Betta fish. 


The overfeeding of your Betta fish can also result in constipation, and this is an incredibly typical occurrence. Bett fish are voracious eaters who will continue to consume food even after they are totally satiated. That is why it is critical to only feed your Betta twice a day for a little period of time of a few minutes each time. You can bet your Betta fish will become constipated if you don’t do this.

Swim bladder disease

Swim bladder illness is not considered to be a disease in the traditional sense. It is a sign of a wide range of diseases caused by excessive intake. As a result, it is possible that constipation is triggering Swim bladder illness in your Betta fish. It is also feasible to go in the opposite direction. The symptoms of Swim bladder disease may include constipation as one of its manifestations. 

Insufficient physical activity 

While many people assume that Betta fish may thrive in a tank as tiny as one gallon, this is not the case in practice. It is recommended that you keep your Betta fish in an aquarium that would be at least 5 gallons in size. There is, however, no upper limit. It is always preferable to be bigger. 

Constipation may also occur if you are keeping your Betta fish in a too tiny tank, which prevents him from swimming about freely and swimming around the tank.

What are the constipation symptoms in Betta fish?

There are a few signs that might help you detect whether your Betta fish is constipated, and they are listed below. It is important to treat your betta fish for constipation if you detect any of the symptoms listed below. Although constipation is the most common symptom, you should look for any other signs of illness in your Betta fish because it could be suffering from something much worse than constipation. The sooner you can determine if your Betta fish is suffering from something other than constipation, the greater the chance that your Betta fish will survive.

Faeces that are stringy 

While this might be difficult to detect unless you are constantly monitoring your betta, you should keep an eye out for stringy feces. In a healthy Betta fish, faeces will sink to the substrate. However, when your Betta fish is constipated, its faeces will be stringy and hang from it. If you observe this then you should consider treating your Betta fish for constipation.

Refusing to consume or spitting away food 

This symptom does not indicate that your Betta fish is constipated in the traditional sense. However, it has the potential to be a helpful indication. If you notice that your Betta fish is avoiding food (which is incredibly strange behaviour for a Betta fish) or spitting it out, you should search for additional indicators of illness as well as the one described above. If you detect this symptom in conjunction with one or more of the other signs of constipation, you can make a more direct decision about how to treat it. 

However, with Betta fish, a lack of appetite is a fairly common indication of a wide range of illnesses and disorders. So you should not trust this symptom alone.

Lethargic/not swimming

When a Betta fish’s stomach is full, the last thing it wants to do is move about in it. You should keep an eye on your Betta fish to evaluate how lively or sluggish it appears to be. The presence of constipation may explain why the stool does not appear to be swimming around as much as it usually does. 

Bloated belly

Constipation in Betta fish is characterized by a swollen abdomen, which is another typical symptom. Betta fish have difficulty emptying their intestines, which means their feces will not be able to pass through their system. More time passes, and your Betta fish’s belly grows in proportion to the amount of time that has passed. 

If you notice that the belly of your Betta fish is bloated or bulging, you should begin treating it for constipation right away. Just make sure it isn’t dropsy before proceeding. The quickest way to tell whether your Betta fish is suffering from dropsy is to examine its scales and make sure they are not pinecone. This is the point at which they become noticeable. If your Betta fish exhibits any of these signs, you must act quickly to prevent dropsy from occurring.

Treatment for constipation in betta fish 

Following your confirmation that your betta is struggling with constipation, the next step is to begin therapy. The first step is to place your fish on a fasting diet. Keep them fasting for around 24 hours as feeding a constipated fish could even worsen its condition. You can start feeding your Betta fish foods with high fibre proportion. In the same way that it does in people, a high-fibre diet will begin to get things flowing again. Some fibre rich items are peas, algae flakes, and sweet potatoes, example. 

How can I keep my Betta fish from becoming constipated? 

It is preferable to avoid constipation rather than treat it. As a result, here are some of the most effective methods of preventing constipation in your Betta fish.


One great way to avoid your Betta fish from getting constipated is too fast fish. It won’t have to be as horrible as the previous two or three days. Once or twice a week, though, 24 hours should be enough. Your Betta fish’s intestines will empty entirely if you give them a fast. This will keep stools from collecting, which will keep you from becoming constipated.

Overfeeding your Betta fish is not a good idea. 

The stomach of your Betta fish is roughly the same size as its eye. As a result, it’s simple to overfeed it. If you’re not sure how much food to give your Betta fish, a general guideline is to feed it twice a day for two minutes. Even if it is full up it will keep on eating, so you must impose a time limit to remove leftovers.

Give your Betta fish a varied diet 

You should not just be feeding your high-quality Betta fish pellets. Instead, you should be including a lot of variety into your diet. You may, for example, provide it with a blanched pea or bloodworms as a snack every now and again. And, of course, make certain that you are providing it with enough nutritious live food. Daphnia and mosquito larvae are examples of such organisms. These items are going to give your Betta fish the roughage it needs to keep its intestines moving in the right direction.


In this post, we answered the question “How to treat a constipated Betta fish?”. We also discussed the main reasons a Betta fish get constipated and its symptoms.

If you have any questions or concerns, please let us know in the comments section below!

Frequently Asked Questions (FAQs): How to treat a constipated betta fish

How long does Betta fish’s constipation last?

Colder temperatures slow down their metabolism. Fast for 1 to 3 days, and depending on the severity of constipation it can take up to 7 days for your fish to get back to normal.

How do I give fibre to my Betta fish?

Feeding your Betta fish a diet with no fibre items may also result in constipation. You can offer peas, sweet potatoes and some live foods such as Mysis shrimp and flightless fruit flies.

What is causing the size of my Betta fish’s poop? 

Constipation in your Betta fish might be indicated by the presence of large spherical excrement in the tank. Dehydration and overfeeding might cause your fish’s excrement to be bigger than the normal pellet size, which can indicate a health problem. Constipation is an unpleasant experience for your Betta, but it is easily treated and prevented.

Are bloodworms good to help with Betta fish constipation?

It depends, bloodworms are great nutritive items to supplement your Betta fish’s diet. However, the consumption of bloodworms should not be exclusive or excessive, once it could aggravate constipation.

What to do if I overfed my Betta fish?

Make your fish fast for a week You can also opt for offering your fish thawed peas. This will assist in keeping your fish’s metabolism clean. It takes place once a week. 

What amount of food should I give my Betta fish?

The recommendation is to feed 2 or 3 medium pellets twice a day and remove any leftovers after some minutes, up to 5.


Wanda C. 2021. Betta Fish Poop and Constipation.

Betta Constipation (Causes And Treatment).

Constipation In Betta Fish (Complete Guide).