oh yeah, skimmers work better after a few days, they have to get 'broken in' like everything else... if in a few more days you're still having problems, like too much foam or none at all then try some adjustments. oh and here is a pic of a diy surface skimmer i made for 10 cents. found a plant seed grower thingy... can't think of the name, but plugged up the bottom holes with silicon, cut some slits around the top, and slid it on.. works great.