i bought an archer fish about an inch and a half long about three weeks ago. just today i came home and found that it is very discolored and its eyes are bulging out a little with a sort of whitish skin looking stuff coming off of them. i don't know whats wrong but it is a new tank, just cleaned it out, water ph and temperature are suited for all my fish, and there is a healthy balance of chemicals in the tank. Also, the tank is about 68 gallons and there is provided swimming room for the fish.