Feature: 1. It only takes 0‑1 minutes to show the results of the water quality, which is easy to carry and convenient for outdoor testing. 2. Adopting the classical colorimetric analysis method, multi levels detection requirements, visual readings with colorimetric cards. 3. The operation is simple, no other supplementary materials are needed, and it is used to test the values of total chlorine, free chlorine or bromine, PH value, alkalinity, and hardness. 4. PH test paper is packaged in a dry airtight barrel and airtight bag, which is durable and can be used for a long time. 5. Water test strips are suitable for aquariums, swimming pools, spas, industrial water, drinking water, pond, hot spring water, etc. Specification: Item Type: Water Test Strips Material: Test Paper Weight: Approx. 58g / 2oz Specification Model: 50 Straps / Bottle Storage Method: cool and dry place, avoid high temperature Test Items: total chlorine, free chlorine/bromine, PH value, alkalinity, hardness Uses: suitable for aquarium, swimming pool, spa, industrial water, drinking water, pond, hot spring water, etc.. Package List: 2 Bottle x Water Test Strip (50Strips/Bottle)