SnowManSnow;523986 wrote: Seems like I remember reading something about UV units a few years back.. in that they were horribly undersized to impact anything but a nano tank. I'm sure they have made advances since then though.
They are if you go by the "on the box" recommendations. There was a GREAT thread that Chris (mojo) wrote about properly sizing UV's. You should be able to find it really easily by searching Reef Discussion.