I have a 200 gallon tank and there were 3 oscars 4 giant blood parrots 3 pretty large jack dempsys and 5 large convicts. now i only have 2 oscars I have 5 emperor 400's (3 along the back 1 on each side) well the oscar was a pig he eat alot!! so this morning i saw like a white line on his face so i thought it was rubbing on the glass.. i go back down stairs and there a giant white hole in his neck like area like somthing was eating away into his neck what the hell was this was it a disease i think it was so i realesed him into a stream because i didnt know what to do with a fish that size so instead of letting him infect the other fish i put him in the stream so please respond asap thanks