Comment to 'Did some measuring: 1. RO water is the yellow-greenish one 2. Re...'
Comment to Did some measuring: 1. RO water is the yellow-greenish one 2. Re...

  • Get a pH pen. Anyone of the cheap pens will give you accurate enough readings. Bonus if you can find one you can calibrate from time to time. Or you can buy a more expensive one if your so inclined. I have this one ( or one like it)

    Meter

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    • I have had many pH pens, expensive wallmounted ones and cheaper ones from eBay etc, had several calibration liquids etc. I never found them to be very reliable compared to each other, only the more expensive ones and only when they were reasonabley new. 

      Thats my experience at least.

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