

Pop-eye
Caused by: bacterial infection, parasite infestation, metabolic disorders, and poor water quality.
Symptoms: one or both eyes swell and project from the head. In severe cases, the eye can burst from the socket.
Occurrences: Pop-eye typically affects only one or two fish in an aquarium or pond, and is not considered to be infectious.
Treatment/Control: affected fish can be treated with MelaFix or PimaFix.