Fish Facts

Why Do Fish Poop So Much?

Why Do Fish Poop So Much?

Every digestive process includes the process of breakdown of food into small pieces and then it comes out of the body in the form of poop.

Fish also poop and pee which is the form of solid ammonia and nitrates. The amount of fish poop depends on how much food it is consuming daily. 

If there is a very little or very high amount of poop then definitely there are some problems with your fish. The digestion of fish is greatly affected by the food it eats. 

If your fish is pooping every time, it means that there is something wrong with its digestive system. The issue can be overfeeding, some digestive problems, extra high amount of fibrous food, etc. Sometimes the poop is long and stringy, while sometimes it is reddish-brown or white which is a result of some serious health issues to your fish.

Why Do Fish Poop So Much?

There are several reasons for fish pooping a lot which will be explained here. 

You are Overfeeding Your Fish 

One of the main causes for fish pooping so much is that you might be overfeeding your fish.

When a fish eats more than its requirement, then definitely the problems will arise. Excess and deficiency of food both are bad for your fish health.

It also depends on the food that your pet is consuming on a daily basis as their main meals. There are several human foods which a fish can eat but people give them everything to grab in their mouth. 

They are not supposed to eat everything which humans eat. It also depends on the species of fish and their eating behavior. 

Like goldfish is the only fish that can eat lots of human foods but not each thing and these are not to be eaten by every fish species. 

You should make a feeding schedule for your fish so that your pet does not always seem hungry to you. 

When their feeding time will be fixed, they will become familiar to be fed on a specific time and there will be no issues of overfeeding. 

The amount of food should also be decided according to the fish requirement. You should not serve the high quantity of food to your fish if it is eating aggressively. 

Because some fish keeps on eating the food you give to them. There must be a specific portion of feed in a specific time of day. 

You can increase the number of meals to be served several times a day but do not increase the quantity of food. 

You should feed three to four small meals per day to your pet fish without increasing the quantity. 

High Quantity of Fibers Daily

Fibrous food like peas and leafy green vegetables are good for fish but not every day. This food should be given to a fish only once or twice in a week. 

Feeding more than normal amount of boiled peas to your fish make their digestive mechanism fast and make them poop again and again.  

Fish are not able to retain the heavy poop for a long time because they do not have a proper stomach and other systems, they poop immediately. 

So, do not feed the high quantity of fiber to your pet and take care of its diet. Serve them a variety of feeds and they will be healthy and perfect. 

Digestive Problems

If your fish is eating non-fish food from time to time or some dangerous things like algae then it can face some digestion-related issues. 

You should not let your pet eat the green or brown algae and for this purpose, you have to clean your aquarium completely. 

Keep on scrapping the algae from the tank glass time to time and wash the rocks and ornaments having algae on them. 

If fish is consuming such things, then they will cause issues in them. You should not feed your fish with bread and other things like this.

Other things that disturb the digestion of fish are the uncooked human related foods like peas, etc.

Is it Normal for Fish to have Long Poop?

Some of the fish foods are responsible for the long poops, which is completely okay. It does not indicate any of the health issues. 

If your fish is eating flakes and bloodworms, then usually its poop is longer. So if your fish poop is long then do not get worried, they are still healthy and strong.

Long poop is never a problem, instead of it, short and broken stools tell that there is something wrong with the stomach of your pet. 

Fish always find a hidden place to pass out their stools because they do not want to do this publicly.

They are seen pooping behind the plants so check them out when they are pooping that if there is some issue with it or not. 

How many Times a Day does a Fish Poop?

Poop is an urgency and needs to eliminate as soon as possible when pressure comes from the bowels. A healthy fish poop one time in every hour. If your fish pooping so much they might be there is overfeeding but a healthy fish do not do this. 

The reason for fish not pooing till the entire hour is constipation while pooping more than thrice in an hour means that its tummy is extremely full. 

Fish can not hold their waste for a long time, they release it from their body immediately when the pressure comes. Feed your fish four to five times a day so that its poop rate can become fine.

Why does my Fish have Poop Hanging from it? 

When a normal fish poops, it sinks immediately on the bottom of the tank. If your fish’s poop keeps on hanging on its anus, then it means that it has constipation. 

Some kind of infections also results in a hanging poop and a large amount of feces that make a mess in a tank. 

You can get rid of these feces by cleaning up your tank on a daily basis and by siphoning the water. 

Most importantly, treat the infection and fish will not make a mess then. It can be a serious health condition which needs to be checked as soon as possible.

How Often Should I Feed My Fish for a Healthy Poop?

You should feed either two heavy meals a day or four to five small servings of food per day.

It also depends on the type of fish that either it is herbivorous, omnivorous, or carnivorous and its size as well.

Besides the routine feed, you should also provide some fibers to your fish like boiled peas.

Peas can make their internal system better and efficient. But make sure you do not overfeed the peas. 

You can feed them with a variety of foods at different meal times. Like peas, some plant leaves and bloodworms and other things like these. 

It keeps the proper bowel movement in fish and all of the issues do not appear. The other food like manufactured one, flakes, etc, are also good and can be a part of their everyday feed. 

Why the Color of Fish Poop is Reddish Brown?

Normal and healthy fish poop’s color is brown or greyish brown. If it appears red, then the first reason might be excessive bloodworms in their feed. 

If you have not fed your fish with worms and still its poop is red, then it is a sign of some serious stages of infection.  

There are more chances of a viral or parasitic infection to your fish. Use the infection treatment medications and consult some fish vet.

Another reason for bloody stools is the bleeding anus because after a severe type of constipation anus got infected and start bleeding. 

You should quarantine such fish and treat it as soon as possible. The things you can do on your own is to feed her some worms so that stools become soft and pass out easily. 


Fish poop is just a part of the digestive process but tells a lot about fish health conditions. You should keep checking your pet’s feces for getting an idea about their health and believe me doing this can sort out so many issues before they happen. 

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