ok im a little worried i have been in saltwater for a long time so my fresh water knowlig is rusty. my gater gar and my tsn eyes are starting to get foggy and im afraid that thay are getting an eye infection. can i throw a bar of copper in there to treat the tank or will it hame the fish. im not worried about it harming the scaly ones it is the scaleless fish that are in the tank it is a 125g set up. i have copper bars from a braker box i tore apart
