I have a male honey gourami in qt. It has been about three weeks and he could probably be put in the main tank. However, he has this white circle on his caudal fin. It is too big to be ick. I can't tell if it is just a natural coloration thing or some kind of fungus. He seems to be doing fine. I recently completed a five day course of prazipro because he had some weird poo. That is fine now. I put in carbon yesterday and did a 30% water change. So here are my options as I see them: 1. Leave him in QT for another week and just see what happens. 2. Treat him in the QT tank with some kind of fungus med. If I did this option, how long does it take carbon to extract the prazipro from the water? I don't want to mix meds. 3. Put him in the main tank which is already being treated with Paraguard for a heat resistant strain of ick. I should be done with the 14 day course of paraguard in the main tank in the next two or three days (have to check my calendar to see when I started). Perhaps just a couple of days would clear up whatever he has (if it is in fact anything). BUT this could also expose the tank mates to anything he has. He was in QT with 2 Female Honey Gourami which i have already moved to the main tank because he was being aggressive after one released eggs. They show no signs of anything fungal or bacterial and are finally starting to explore the tank without starting at their own reflection. I am sure there are more options, but these were the main ones I could think of.