Not all blennies will work. You would have to research them individually, as I couldn't advise you on any but the one I have experience with and that is the bicolor blenny. They are jumpers, what I have seen many people do, and what I will do once I get my sunpod is go to home depot and get that white egg-crate looking stuff that they use to put over fluorescent lights. Cut it so it fits perfectly, and choose some that has smaller holes than the fish. That is really my only idea as far as that goes. HTH