My aquarium has a slight scum on the surface. It's a 75 gallon, and I'm running 2 marineland 360's. It's been a long time since I've done tanks and in the past I've always ran wetdry's so the surface skimming has taken care of this scum/glick. I was just wondering if there is any other way to remove it with out using a wetdry, or will it eventually go away on it's own? Also will this be a reoccurring problem? The tank is a new set up and is in the third week of the cycle.