What do you guys do for maintenance other than glass cleaning and water changes? Does anyone vacumn their sand?? My sand seems to be getting king of funky and has a little algae on it in one spot. It looks worse behind the rocks. I've been thinking of putting a small PH blowing behind the rocks to keep the stuff from settling back there. Right now my crew consists of 20 astreas and 6 small blue legs. Also getting a little algae on the rocks other than coralline. The coralline is slowly taking off. Do I need a bigger crew? Also should I clean out my sump also? The only thiing in my refuge section right now is a small ball of chaeto. Skimmer seems to be working ok and params are fine.