So, I'm in the middle of treating 8 corydoras who I think all have ich. I only saw two who physically had the white spots, but I decided to treat them all just in case it was still internal since I may have caught it early. I moved them to the hospital tank and I noticed something else on one cory. A goldish/white spot on the dorsal fin. I'm not sure what it is but can the ich medicine still treat that or do I need to combine medications? It looks like it could just be a little body damage, but I wanted a 2nd opinion before I decided to do anything else.