Use an OTO test (the one that turns yellow). It does not bleach out like DPD can. However it only tests TC If your chlorine is 3 it will turn yellow. It it is 30 it will turn orange to brown and the pH is not really high.
Re: innaccurate very high ph test??
Use an OTO test (the one that turns yellow). It does not bleach out like DPD can. However it only tests TC If your chlorine is 3 it will turn yellow. It it is 30 it will turn orange to brown and the pH is not really high.
Retired pool store and commercial pool maintenance guy.
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