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Added a comment to Yes, go with watching pH, just check it isn't usually an issue i... 

Did some measuring:

1. RO water is the yellow-greenish one

2. Ready mixed nutrients+CalMag is the Orange one.

3. Also measured RO+CalMag but that looked exactly like the yellow-greenish one so no photo added. 

 

Nutrients are Terra Aquatica tri part.

 

Any thoughts?

Comments

    • 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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