Still having problems with the Discus I purchased from The Discus Place. One has a patch of white fuzzy substance growing on the dorsal fin and another on its side. It is growing very fast. A smaller one now has it on the lower fin. I started treatment for fin rot but unable to find anything that looks like it in the books I have. Only two of the fish I ordered have it but all are still very stressed and I have had them over a week. I have now purchased a small tank to move them to. PH 6.8, Nitrite 0.0, Ammonia 0.0, Nitrates are a little over 0 but not enough to notice. All the original Discus in the tank are great. The tank is 150 gal. bow front. Live plants and driftwood. Everything is great except the fish I received from The Discus Place. I am treating with Melafix and Stress Coat. Again started treatment yesterday. Does any know if this is fin rot or what it is and also the best treatment for it. I have had saltwater and freshwater fish for years and have never seen this. I use a UV Sterlizer and have never had a problem. Please help!!