So my angel developed quite a case of fin rot ( our filter started having issues, we didn't realize, etc) So we fixed that. But its still not better. So I'm setting up a 10 gallon hospital tank now. Going to use our bio media to hopefully instant cycle before I move him into it. Our fish store recommended api tc. tetracycline as a medication. I just wanted to check to see what you guys thought of this stuff for angel fishes ? There is one spot on his body that looks "peely". So i feel that is gotten to the advanced stages. He's still acting totally normal and eating. Any advice before I proceed with the meds ?