I got 2 rpbs about a week and a half ago, they are about twice the size they were when i got them(about 1 1/2" now). Right now they are in a 25 gallon tank, i know this is going to be too small, and i plan to get a bigger one when they grow a little more. They are in the tank with 2 plecos, a feeder guppy, and a goldfish. the p's often fight with eachother. They don't really eat the other fish, the goldfish has missing tail fins, but it seems that they like fish flakes. I also feed them beef. What i want to know is should i add another? and if i do how do i make them not eat the new one(who, chances are, is going to be smaller then the ones in the tank)?