Check the listing for details. Pool Testing Kit,Pool Test Strips,Spa and Hot Tub 50 Strips. Condition: New. Listed at 10.99 USD. Pool Testing Kit,Pool Test Strips,Spa and Hot Tub 50 Strips in Box, Sealed POOL AND SPA WATER QUALITY TEST:Suitable for various occasions,it can testing total chlorine,bromine,hardness,free chlorine,pH ,nitrite,total alkalinity.ACCURATE AND EASY TO DISTINGUISH:Take a strip of test paper immersed in the water for about 2 seconds, remove it and lay it flat, compare the reading with the color card after 15 seconds.50 STRIP PACK:50 stripes in total.Each pool test strip provides accurate results for any water sources including spas and hot tubs for periodical testing and monitoring.KEEP POOL WATER BALANCED:Detectable range total chlorine 0-500,free chlorine 0-20,pH 6.8-8.4,total alkalinity 0-400,hardness 0-425.EASY TO STORE:Test strips were packed in a easy-to-store container to ensure long-term storage.