[BlueAbyss]

I would combine protein skimming, ozone, and vodka dosing (and carbon). A 3 pronged approach to getting 1. the clearest water possible, and 2. reducing nutrient levels across the board.

I agree that hobbyist units that are commonly available will probably not overall reduce bacteria populations, but you could combine ozone and UV, one after the other to get the maximum benefit out of it. And a slower flow rate on the ozone reactor would help there too.