AquaChek Hardness Spa & Pool Test Strips
$9.95
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AquaChek Hardness Test Strips for hot tubs & pools check total calcium + magnesium. Too low causes corrosion & foam. Too high causes scale & cloudiness. 25 tests. Total water hardness Low range (up to 120 ppm) High range (from 250 to 1,000 ppm) Product Notes: Dip strip, remove, then compare to chart.
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$9.95
(+$1.45)