cheap hydro meter $20

Discussion in 'Grow Room Design/Setup' started by indoor organic, Aug 28, 2008.

  1. "Hanna waterproof PH/EC/TDS meter - model HI98311 for conductivity testing. Used only a few times and in good condition. Details can be found on the web by searching the model number. Even though the meter name has PH in its title it does not test PH. "

    You should be ashamed



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