alright so i have a very small black piranha (maybe 3 inches tops) in a 10 gallon tank, he'll be in a larger tank in less then a week. So anyways Ive had him for about a month ish and hes been eating like a pig, hes been feeding of broken up market shrimp. But just recently i thought he might have some sort of fin rott problem so the person working at my local fish store told me to use Melafix. Well since i started treating he doesnt want to eat anything i threw in some market shrimp, he put it in his mouth and then imideatly spit it out. So anyone know why he would just randomly become disgusted with the market shirmp hes been feasting on for the last month? should i swich teh food up? ugh confused, btw hasnt eaten in almost a week now, UGH
