In my opinion, and we all know what opinions are like
, stripping the water column of all life 100% of the time is not good. Yes there is film bacteria attached to most surfaces but some level of plankton and water born bacteria is good for the system and the corals. Having mostly sterile water could allow more bad bacteria to form larger populations. At 160,000-200,000 µw/cm² I would think that there wouldn't be much that survived the trip and over the course of a few hours everything in the water has made a several trips through the UV. Those are the levels I'm thinking about for a cycled fish QT tank, maybe even a little higher. But I need to be sure that Copper Power and possibly H2O2 won't form toxic compounds before I go that route.
Thank you very much for the link. Very good read so far, I'm about half way through it.
Did you read Bill's posts above? In that line of thinking why not feed a sheet of mysis to the system a day? More food is better, right?