I think if the CBS is well fed, he shouldn't bother the other shrimp. I have one with a few hermits and snails and he is the hit if the tank, dancing over rock and climbing up glass. He can even catch flake food out of mid air (mid water??). I break up some sinking food into pin head size pieces and plop about 2 or 3 in a day. What the CBS doesn't get the hermits do.