If it's a brand new skimmer, remember there is going to be a break-in period where it's not going to work correctly (at full potential) for a while.... Usually 2-4 weeks for most skimmers. While your tank is cycling, you can set the skimmer in a separate container of salt water & have it running to get this process moving along. It doesn't need to be heated water, but it does need to be saltwater..... the different specific gravity does make a difference in bubble size/structure.
Wanna calculate the cost of that new reef tank?? Take your worst nightmare, double it, and you're halfway there.