Chris, I run bb too, and have a hell of a skimmer. I feed 3-4 mysis cubes a day to 7 fish. Now that is alot of food..... Sometimes, on days off I add in addition cyclopeeze, rotifers, and oyster eggs, all in addition to the 3-4 cubes of mysis. I cut the main pump off, so no overflow, throw in the food for awhile till it is all consumed, then turn back on. If your skimmer is well over-rated for the tank, flow is strong, no detritus collection, then that really is what bb is designed for, overfeeding to a heavy fish population, with heavy export. My Euro-reef is rated for 2+ times my tank. I truly feel the rdsb fuge has also helped to bring nitrates down. Keep in mind, if you start minimizing the amount of nutrients going into the tank, your corals will probably lighten up or pale out. As far as water change goes, I doubt it will hurt the corals, just make sure you buffer to what you normally keep your current levels in you tank.