Date:   4/14/2009 1:08:50 PM ( 16 y ago)
Hits:   4,793
URL:   https://www.curezone.org/forums/fm.asp?i=1396533

With a rather expensive ph meter that was checked twice daily with a ph Calibration solution that had a specific pH according to the air temperature.

As they say, it was balls on accurate.
 

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