??? What kind of skimmer are you using? Most skimmers I've seen keep the bubbles internally, so the frothy gunk bubbles up to a collection cup and the water is returned sans bubbles. Maybe you should have the return flow into a sump, so the bubbles can dissipate before hitting the main tank?
A UV isn't needed with most tanks. IMO, a good quarantine tank will serve you far better than a UV. For reef tanks, UV kills off much of the food source for filter feeders, and can cause a jump in nitrates--all those bitty little corpses decaying just isn't good.