Without a good picture it is hard to verify the LFS diagnosis but it sounds like fungus. I have not used Kordon Rid Fungus but when I had a bad fungus infection in a Corydoras API Melafix did a good job. I do not recommend mixing medications.
75 Gallon, 2X55W AH Supply CF 8800K, 1XMarineland Doublebright, 2X Marineland 350 Magnum; 45 Gallon Tall, 96Watt AH Supply CF 6700K; 30 Gallon Long; Fluval F&P 2.0 36"/46W; 20 Gallon, 1X26W AH Supply LED kit; all with Press. CO2; (Calcined) Montmorillonite Clay
Greater Seattle Aquarium Society (GSAS)
Last edited by Seattle_Aquarist; 02-03-2013 at 04:24 AM.