I bought 4 hoplo catfish from chain store couple days ago..yesterday I posted in another section, but symptoms have changed. I now have one cat with serious fin rot, and two that have pretty serious ich. Fairly sure I might lose the guy with rot, but the two with ick dots are behaving fairly good otherwise. I have Coppersafe that has worked for bettas in the past, but worried about dosage. Would they be okay with say, 3/4 dose? Or would that aggravate disease to be non respondant? What about the fin rot guy? I have melafix?