Thanks, I"ll give that a try. For right now while I'm breaking it in, I have two aquaclear 4000 pwerheads, a red sea prism skimmer, and a rena xp3 canister, with about three inches of sand and 100 pound of rock. I know I should have gone with a sump, but money was a factor and the xp was a good price. As soon as cash allows I can get my live sand and about 200 more pounds of rock. I"ll give this canister a try for now and see what happens.