Ultra-Low Phosphate
Kevin should check out this Hanna Ultra-Low Range Phosphate Colorimeter:
http://www.canreef.com/vbulletin/showthread.php?t=67184
As a reefer, I find this product very useful.
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180 gal tank, 50 gal sump, PM RFCa6 Ca Reactor, SWC Extreme 250 1A Cone Skimmer, Tunz Osmolator ATOF, Aquacontroller Apex, Aquaillumination Sol Super Blue 6 x 75w Units, Acros/Softies/LPS/Mushrooms/Zoos, Purple/Powder Blue/Yellow Tang/3xBlue Chromis/2xTomato Clown/Lawnmower Blenny
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