3afef2422f65e1f87f73d7f10b83e986 zpsdbeec70a - Anybody use UV? If so, why?

Yup sure do ! Also always have,aqua UV does a fair job of explaining the required GPH for most effective results. 114 watts is allot of UV bud. I would recommend you talk to them and explain what your running and want to achieve here is a link with the number

http://www.aquaultraviolet.com/industries/aquariums