My Blackfoot started showing signs of ich over 4 months ago now, and since then I have tried using multiple treatments including a combination of whitespot and fungus drops, paraguard (seachem), Melafix(api) and am now using aquarium salt (I don't have a heater so can't increase temperature) and the fish still has spots. The thing is there is a second fish in the tank that doesn't have any spots, and both of them don't seem to be getting worse. Sometimes they can be a little lethargic but other than that they are great. I've attached a picture of the blackmoor so you can see his spots; it's a little blurry but you can see the spots on his gill plates. Any advice on this would be great, I don't even know if it's ich anymore!