I think general consensus is you want to keep it below 0.04ppm.Ive read some threads on RC showing making it absolute zero for too long had some decreased growth effects on certain Acro's after a few months. Ill look for the link
Edit found the link
http://www.reefcentral.com/forums/sh....php?t=1168053
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Current tank---125 gallon mixed reef 60 gallon sump, Reef octopus nw200 skimmer, Rapid LEDs, Maxspec gyre, Mp10s, Fuge, Biweekly 20% WC, QT everything
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