Water testing for swimming pools or spa pools. Detectable PH range: 6.88.4. Residual chlorine range: 010. Total hardness range: 0-240. Can test effective chlorine, pH, total hardness. TEST FOR FREE CHLORINE, PH AND TOTAL ALKALINITY: Dont wait until your eyes burn and your swimsuit bleaches white to test your pool – just dip a test strip!
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