Pink bar gobies do not sift the sand. They will move it around here and there but only as it is building tunnel systems with paired pistol shrimps. I don't believe any of the sand sifting gobies will pair with pistol strips. Whatever you decide make sure you have a tight fitting lid as all of them are jumpers. Don't have any frags or corals on your sand bed that you wouldn't want to be digging up as they love to bury calls. It isn't as bad with the non-sifting gobies as they only do it in the beginning stages of building their tunnels with the pistol shrimps.