Comment to 'Determining ph, what methods do you use? pens, litmus paper, etc.'
  • I have a couple of meters with probes that sit in the reservoirs, A blue labs doser and PH pen, I like to have a lot of back ups 

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    • Good day to you as well. Yes it has been a while.

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      • Not the same blue unless he deleted all his photos.

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        • i am still a big BHO fan. I wasn't  able to access my established account. 

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