Treatment

The most common cause of fish illness is overfeeding.
This occurs when fish are fed more than they can consume in 90 seconds.
The extra food falls to the bottom where it rots and produces toxins.
Stress causes fish to get sick as well.
It can be caused from a bully fish that chases and bites other fish, temperature changes from direct sunlight or an overly large water change(only change 1/3 of the water).
Ich: a parasite that causes small white spots on the fish. Often it can be treated by raising the temperature of the tank or by adding sea salt to the tank.