Betta fungus can be caused by many factors, the most common of which is an unclean habitat.
Because your betta fish swims in a self-contained ecosystem with a finite quantity of water, plants, rocks, and square footage, you need to realize that your fish breathes, excretes, drinks, and sees through the water you place him in.
So as the water becomes contaminated and planned with excrement, leftover food, and as the rocks start eroding, as the plants start decaying, and the fish is constant respiring, you need to remain vigilant about your fish's water quality, otherwise not only will your habitat develop fungus, but your little marine friend will inevitably develop fungus as well!
So how can you tell if your fish has eaten a betta fungus infection?
Your fish may be exhibiting one or more of the following symptoms which are listed below:
– Betta has patches of white spots all over his body or head that look like little patches of cotton.
– He may be less active than usual.
– He may have a reduced appetite for eating.
– His fins may be clumped, and his body color may be pale and less vibrant than before.
So how can you cure (and prevent) betta fungus?
Adding aquarium salt to your fish's habitat is an extremely effective way to combat betta fungus and to prevent it from occurring again in the future.
There are also numerous fungus medicines you can get for your fish from the pet store.