My catfish has hole in the head and I have been doing consistent water changes and monitoring the water parameters. I have also been feeding him a better diet including shrimp pellets, sinking wafers, krill, bloodworms, and frozen brine shrimp. Also I have been soaking all the freeze dried food in Vita-Chem. I was just wondering how long it would take to notice any differences in his spots on his head. Anybody have any experience with this issue?