Red Phenol pH Level Testers - 50 Replacement Tablets

Item #123233


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Phenol red tablets are based on pH sensitive dye which use a color scale to determine your pool water's pH level, ranging from yellow (pH 6.8) to red (pH 8.4). These 50 replacement tablets work with the 2-Way DPD Tablet Test Kit.

NOTE: The optimum pH range for swimming pool water is between 7.2 and 7.8.

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