Enough Balanced For Your Swimming Pool, Hot Tub, Spa And Other Water Testing. Just Dip In Water For 1 Seconds; Then Take It Out, Hold The Test Strip Horizontally For 15 Seconds; Compare With The Color Chart On The Bottle To Obtain Clear And Accurate Water Quality Results.high-quality Fiber Paper And No-bleeding Pads Selected After Repeated Trials By R&d Personnel.
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