Taylor Toluidine Blue O Indicator - 2 Oz. (60 mL) Dropper Bottle - R-0881-C monitors_pH ORP Temp PPM These are true readings of
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Taylor Toluidine Blue O Indicator 2 Oz. (60 mL) Dropper Bottle R 0881 C monitors_pH ORP Temp PPM These are true readings of These are true readings of Free Chlorine and not approximate values derived from ORP readings will reduce scale buildup