Hi im just new here at MFK! Ive been taking care of 5 red bellied piranhas in a 75 gallon tank. I took consideration to all factors, such as light, noise, water and food. But still my RBPs are not reddish under their bodies. Ive been taking care of them for 8 months. The biggest is about 7". Smallest is around 6. Please any suggestions or comments will do.


