My Oscar fish has recently developed little pits on his head which I have just found out might be a disease that is common in Oscar fish known as hole in the head. I am unsure of what to do to treat him and help stop this disease from getting worse and from searching on the Internet about it there have been a lot of different advice on medications to treat him but I am not sure which is the best one. Does any one have any suggestions for the best way to help my Oscar?