thank you so much for ur input. so far i have about 6 lb of live rock in the tank. the tank has been running for about 1 month now i think. i have two clown fish (perc), 1 cleaner shrimp, and 5 small red hermit crabs. i have about 3in of live sand current in my tank. i have a millennium 2000 filter that pumps water through it at a rate of 160 gallons per hour. in addition to that, i have a duetto internal filter that pumps water through it at a rate of 55 gallons per hour. the internal filter works like a power head..do you think this set up is adequate? anyone's input is welcome