I have a baby red ear sider (shell is about 2 inches long). He lives in my 30 gallon aquarium for the time being along with some small cichlids. One of the cichlids got beat up in my big tank and has some fungal stuff going on so I have been treating it in the 30 gallon tank with the turtle and the turtle is doing just fine, however the fish doesnt seem to be healing. I want to try adding aquarium salt but will it harm the turtle to have salt in the water?