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#13
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I found some better tips from Hanna Instruments here: http://www.reefcentral.com/forums/sh....php?t=1961215
The instructions say to shake for 2 minutes, but on the forum post it sounds like it's not required. I'll try that tomorrow with the same cuvette. I did the test again and got 5ppb (6ppb and hour before that) |
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