I've almost always run DSB over a plenum in my reef tanks. I use a simple airstone bubble lift, no power head. I've never had any negative experiences with them. In my current setup it seems to harbor tons of pods, and recently I found a shrimp about an inch long coming up the bubble lift. Lots of discussion can be found, pro and con. My goal is to maintain slow movement of water thru he sand bed. I have a very industrious pistol shrimp that lives with a diamond goby and a yellow watchman goby. Two fair sized brittle stars and a dozen nassarius snails and the shrimp and gobies keep the sand bed constantly stirred up.