ZHIYI 6-Way Hot Tub Test Strips Spa Pool Testing Kit for Water Quality Ph Hardness Total Chlorine Free Chlorine Bromine Total Alkalinity Nitrite Total

? When pool water is unbalanced, sanitizers can be less effective and cause irritation to the skin and eyes. It can even damage the pool's surfaces or equipment if left untreated.  ? So it is very important to test water quality of the pool regularly, suggest pool water quality should be tested every week.  ? Fast & Simple To Use: Just dip a strip in water 2 seconds, take it out and wait for 15 seconds, compare each panel color changes to the color chart on the side of the bottle, then you can get the the accurate results of water quality. ?Wide range of applications:  The water test kit strips can be widely applied in different outdoor or indoor swimming pools, spas, hot tubs, aquariums, fish ponds. ?Important tips:  Store in a cool dry place away from water source to ensure freshness and longevity of strips.  Also to ensure freshness, when you take out a strip, put the lid back on properly.