I recently discovered on Sunday my Clown Loaches and one of my Opaline Gouramis had Ich. I'm not sure sure where it came from but my local fish shop told me to try Formalin MS and Nox-Ich at half dosage so it wasn't hard on my clown loaches. II tested the water and it was fine. I did a 20% water change, used both medications and kept my tank at 80 degrees. As of today am really not seeing any thing clearing up either. It also looks like it may be spreading to my other fish. At this point I am not sure what to do.