I went to the lfs to get some fish to cycle my 5gal fry tank. Got 6 feeder platys.put 3 in main tank becuse of the fighting in the 5gal.Now i got to looking the 3 i left in the tank 1 has a chunck out of his tail fin 1 has white an anal fins and one isjust mean.the 3 I put in the main tank 1 has...