To cut straight to the point... I came back from a weekend trip to see one of my big channels all cut up. I think he must have gotten spooked and thrashed in to his PVC tunnel. Anyway he has mildly torn fins, a few scratches, and the big problem... A missing piece of skin not quite the size of a dime by his gill. As this happen a few days ago and just found it when I got back just now... He seems to have a fungal infection on the open wounds. He seems very stressed. I all ready added melafix and pimafix to the water and have a few air stones hooked up to the tank. From what I can tell it is strictly fungal not parasitic. Anyone have any suggestions here? All help is appreciated! Also remember we are dealing with a scaless fish here.