I think after much looking on the web that my catfish have ICH, how do I treat it? Much of what I have read says not to use certain medications on fish that are intended to be eaten, and then there is the plant side. Some of this stuff out there says not even to put your hands in the water after treatment. What's my options? I have started water changes but don't think that will kill it, I have already lost 10 fish. If you look at the fish in the water they look like they have salt spots on them, if you take one out it looks more like a green slime.