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Old 02/09/2018, 03:23 PM   #9953
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Join Date: Feb 2007
Location: Santa Monica, California, USA
Posts: 2,489
Ironically a UV can increase nutrients, by killing phyto and pods in the water column. Not much though, because most people don't have much in the water because of mechanical filters.

Inventor of the easy-to-DIY upflow scrubber, and also the waterfall scrubber that everyone loves to build:
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