Yup, I have a substantial sandbed in the display along with a closed loop on a Mag 12 in combination with a Seio 620, a Maxi 1200 with eductor, it took a little trial and error to get the outputs just right, and I do get an occasional sand drift, but not bad at all and the flow, well, the acros just love it. In my breeder, no sandbed, just the closed loop, the Mag 18 really churns up the water and the acros seem to enjoy it as well. Even with in tank pumps, you still run the risk of sandstorms, you just have to experiment with positioning to find the right placement. Liverock can work as a delector to mellow the flow. Hes planning lps and softies, so this type of radical flow wouldnt be as necessary.