well as u all kno i had three 3inch rbp's in my 55 i gave 1 3inch to my nephew and kept 2 then i went and bought a divider and 3 more dime size rbp's and added them to my 55 gallon so every day i wake up some how one of the p's end up on the wrong side of the divider and this went on for a few days so wat i did was jus took the divider out cause i figured they wanted to be together as a shoal so now its been day 3 that they been swimming togeher no fin nips and there doing good