Have you ever nursed fears of what you would do, if the fishes you are rearing suddenly become sick? Well, the beautiful part about illnesses is that if you know how to prevent them, then you wouldn’t have to worry about treatment after all. Albeit, what if you have a pond that is currently plagued with some of the most common fish diseases there is? Do you just give up on your sick fishes or are there ways out of it? Oh…you bet there sure is!

This article will be considering some of the most popular fish diseases, and what you could possibly do to get rid of them. Just like malaria in humans, these diseases in fishes often seem like a ritual with the fishes, and whatever you do, it’s like a deal that must come.

That’s why to be forewarned is to be forearmed. So tighten your seat belt, as we dive right into these common fish diseases and how to deal with them outrightly!

White Spot

This is possibly the most common disease amongst fishes because; the dormant form of the disease exists in most fishes. Hence, with a little stress, which takes a toll on the fish’s immune system, the disease becomes full-fledged.

This disease is parasitic, and symbolic of covering the fish from head to tail with white spots or dots all over. The white dots are the parasitic organism themselves; hence after staying on the fish for 24-48 hours, they drop off and spread themselves to other host-fish in the tank.

In order to treat white spot disease in fishes, immediately isolate any fish observed with the symptom and quarantine it for treatment. Treatment is vital, as the white spot can be destructive, if left alone.

Treatment can be done by first removing the fish and treating the water with anti-parasite formula. But it’s vital that the formula chosen is right for the kind of set-up you are running.


This disease is caused by a bacterial infection present in most ponds, if the fish’s immune system becomes compromised, then the disease takes hold of the fish.

The name “dropsy” is derived from the human disease called edema, and it manifests most of the symptom on the fish; massive inflammation of bodily tissues, which causes the fish anatomy to swell into unnatural sizes—the eyes, gills, and glands.

It’s easy to notice the disease in fishes because its scales will protrude out of the body as if it is standing upright. With this, you can easily spot that dropsy is present. Treating the disease isn’t so easy though, but possible if the disease is detected early. Quarantine the infected fish so it doesn’t spread the disease to others, and then treat the infected fish with antibiotics.

Prevention of dropsy is way easier than its treatment though. And this can be achieved by making sure the tank is well maintained, and avoid scenarios that could get the fish stressed, and an unlikely chance of the dropsy epidemic ever occurring.


Fish can be subject to fungus infection as well, and it could get pretty nasty. This can be easily noticed by the white and grey patches appearing on the fish’s body. If the condition is left untreated, it could look like a hairy patch of moulds.

Fungus often feasts on your fish’s exterior, and if left untreated it will slowly eat away at its scales and flesh of your fish. Your fish will die if left unattended to with fungus infection.

This condition can be treated by treating your fish with anti-fungal or antibiotics substances. The likely cause of your fish developing a fungi infection is poor water quality or existing parasitic condition. So, to prevent an occurrence or a reoccurrence, it’s often best to test your water quality first and observe for parasitic conditions and then treat first; before introducing your fishes into the water.

Fin Rot

This is a bacterial or fungal infection that affects the fin of the fish, and the fin starts to rot. The fin can fray, turn brown or start to rot in ways that are noticeable to the eyes. There are numerous treatments available for fin rots that can clear all strains of the disease and cause the fish to heal quickly.


Prevention they say is better than cure. Hence, we advise that you maintain a hygienic condition in and around your pond every single time so you don’t give bacteria, fungus, or even viruses and opportunity to thrive on your fish.

If you have sickly fishes, maybe it’s time you revisit your measures all over and start indulging in best practices henceforth.

All the best!