Went on vacation and fed flakes came back and my clownfish was swimming in circles on his head. Did a treatment of prazipro and fed him antibiotics. He is still eating and he has a stringy white pop sometimes brown. He has not gotten any worse but hasn’t got any better. All other fish and cuc are normal. No injuries I could find except he has a small white patch below his lip. I have him in my tank in a cage so my neon goby doesn’t just destroy him while he is sick. Any ideas on what I can do. I have had for 8 months this is the first issue. I haven’t added anything new to the tank in 2 months