sand that is. I keep having to skim out the red algae and the top layer of sand when I do my water changes. Soon I'll have no sand bed. I am hoping when I get my maxi-jet pumps in maybe I will get rid of the stuff.
try a bullet goby. I had the same problem upped my flow skimmed wetter and got a bullet goby oh yeah I cut back on feeding. The bullet goby does a GREAT job of keeping the sand clean. He however can be a pain with spitting sand on the corals. The corals don't seem to mind but I do. I wonder if they get some kind of food from the sand he spits on them?
Yeah...I used it, it works great for a month or so...but you have to make sure to turn the skimmer off and actually you are supposed to add an air stone to the tank as well...then do a 20% water change.