I currently use UV and biopellets Jen. Just make sure the eflluent from the biopellet reactor goes either straight into the skimmer or at least in the skimmer compartment. Hooking it straight into the skimmer is pretty straightforward. All you need to do is get a PVC Tee that fits your skimmer input and stick it on there, loosely even as it doesn't have to be water tight, and then stick the tube from the biopellet reactor effluent and stick it in the PVC Tee. The other opening will allow the skimmer to continue to pull extra water as needed since the biopellet reactor will not supply enough for proper skimming.
I used to run the UV on my system in the sump to process all water returning to the DT but have since moved it to the DT. That way it'll pull water directly from the DT, towards the bottom, expose it to UV, and then return it right back into the DT.
If you get bored and want a good read for Valentine's Day, here's my UV experiment I've been running:
http://www.austinreefclub.com/topic/33773-uv-sterilizer-experiment/