Gothca, makes sense to me. I'm a fan of small more frequent water changes myself. When the Mrs. and I finally build our house I'm wanting an auto water change system, changing out a few gallons every day. She's already given me permission for a music/aquarium room, CAN'T WAIT LOL!I agree with you. I guess what I mean by harsh is that a water change of 1 gallon is a much larger wc for a 10gal with 12 lbs of live rock and a deep sand bed as opposed to the same 1 gallon wc to a BB tank with 8lbs live rock. I would consider it less of a shock to the system because there is more water volume. Basically a larger wc compared to a smaller wc. I have always been told that its not good to do large water changes.
