so i have 2 pbass and an oscar in the same tank and when i feed them the one of the pbass (the bigger one) and the oscar eat all the feeders. the other pbass its fast enough or something. and every day he is getting skinnier and skinnier. is there anything i can do? and pretty soon he is going to be small enough for the O and other P to eat him. just today the oscar bite him instead of the feeder