Yes, the phenol red pH test is affected by either chlorine or bromine being high, usually above 10 ppm FC for chlorine or 22 ppm Total Bromine in the case of the Taylor kits.
Re: PH reading different from phenol red vs. strip
Yes, the phenol red pH test is affected by either chlorine or bromine being high, usually above 10 ppm FC for chlorine or 22 ppm Total Bromine in the case of the Taylor kits.
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