7-in-1 Inflatable Swimming Pool Water Test Strips - Accurate pH & Chlorine Level Testing Kit for Spa, Hot Tub, and Pool Maintenance | Home & Professional Use

The appearance of1. Please use the color code card on the bottle to compare colors.1 bottle of 100pc test strips1. Do not put wet into the bottle.3. Tighten the bottle cap each time after removing the test strip.3. Compare the test strip with the color chart on the bottle body and complete the reading within 30 seconds to obtain accurate resultsComparison of test results：4. Compare the color of the test strip under good light to get the best reading. 5. Store in cool, dry and dark conditions.1. Immerse the colored part of the test strip in water and take it out after 2 seconds.How to use when testing：After 1 minute, the total hardness, residual chlorine, bromine, total chlorine, cyanuric , total alkali, and ph of the sample water can be detectedOne test strip of this product can simultaneously detect seven important of the sample.this product is a thin strip, one end is arranged with the detection block according to the scientific distance, and the other end is a hand-held position.2. Do not touc h or contaminate the test block on the test strip with your hands.2. Lay the test strip flat and wait for 30 seconds.6. It is recommended to use up within 90 days after opening.