Hi Jeff, thanks! Well, I have really good flow in the tank. I highly recommend the Vortex pumps. I don't have a really fancy setup...just a Reeflo Dart pump and the Vortex. I also really recommend the Flow Accelerators from Pacific Coast Importers. They use an eductor setup and the amount of flow they push is great! I have the very top of my sand at an almost imperceivable roll. My cleanup crew is also a big part of the white sand. I have the following: 2 Atlantic cucumbers (these guys do an awesome job of sand cleaning), 3 Tongan Conchs, 10 Large Tongan Nassarius snails (much better than Vibex, IMO), 20 Cortez Mexican Red Leg Hermits, 2 Mexican Turbos, 20 Cerith snails and 10 Red Banded Trochus snails. I'm very partial to these inverts over many of the others as they seem to be the perfect compliment to each other in regards to what they clean. HTH, Marcye