hello everyone, so I have three red belly piranhas, two are male one female, they are pretty well full grown, I have a friend with same type and when he feeds them pretty well anything within seconds they attack and eat every last bit. I normally feed mine frozen shrimp or smelt, sometimes the odd goldfish, but when I drop something in they don’t even really bother with it, sometimes if I drop like 3 shrimp in at night, the next morning there will still be one in there. As well as if I feed them feeders, they will sometimes be in there for a couple days, I only feed them every 2 or 3 days, they look very healthy, and also when u do see them eat the female always seems to get chased away and does not seem to get anything to eat, she is significantly smaller as well. Any advice would help. Thank you.