My red oscar has had hole in the head and is currently being treated with Metro+.... I have done a lot of research on this and it seems that proper of vitamins and nutrients will help in the curing of this disease. The only problem is that my oscar is refusing to eat. I fed my oscar Hikari Cihlid Gold, and Hikari Carnivore Food Sticks. Because my fish won't eat I can't get in the vitamins and nutrients. The medicine also doesn't seem to be working and my LFS said that was the only thing they had that could cure HITH. I do water changes weekly. Should I remove the carbon from my canister filter? Will removing carbon work? Please help. I don't know what to do.