【6 in 1 Pool Test Strips】You can test your pool and spa for pH, free chlorine/bromine, total chlorine, total alkalinity, cyanuric acid and total hardness. Keep your water healthy and clean all year round 【Easy to Use and Read】Soak a strip in water for 2 seconds, then take it out and wait 15 seconds. Compare any color changes on the color chart on the side of the bottle to get accurate water quality results. 【Premium Quality】The swimming pool test strips are made of high quality imported filter paper. Each test strip with 6 color indicators provides high accuracy and reliable instant reading. 【Easy to Store】These spa test strips are packaged in an easy-to-store container. 50 strips/pack, each pack was well sealed with 5 individual moisture-proof packets to ensure the spa test kit can be kept for 2 years.