OK, after some searching I have come to believe they are Camallanus worms. I cannot find a supplier for levamisole that actually has any in stock, so I am going with Panacur. ANy one have any advice on its use for the fish? It comes as granuals with a concentration of 222mg/g of fenbendazole. The packets I am getting are 4grams each (comes in a pack of 3 packets)