<p>Wiher Water Test Strips, 16 in 1 Pool Test Kit for Freshwater and Saltwater Aquarium Test Strips - Fast &amp; Accurate, pH Test Strips,Hardness Test Strips Heavy Metal Elements Test Strips</p> <p>Why do I need to test the waters? If your water contains unsafe or undesirable parameters that could be harmful to your health.</p> <p>How to know drinking water? Our water testing kits allow you to check that your drinking water is in good condition.</p> <p>What are the advantages of our test strips? You can get results easily and quickly without having to mail them to the lab first.</p> <p>How often do you measure the water? Experts recommend usually 2-3 times a week.</p> <p>Storage Condition and Expiration Date</p> <p>1. Storage condition: Store in 2℃ ~ 30℃ dry place away from light (store at 2℃ ~ 8℃).</p> <p>2. Product Expiration Date: 12 months ( Store in 2℃ ~ 30℃ dry place away from light.).</p> <p>3.Warning: After opening, the lid should be sealed and stored in a dry place of 2℃ ~ 30℃ away from light. Please use it as soon as possible.</p> <p>Package Included:<br>1*100/200 Pcs Test Strips<br>1*Test Tube<br>1*Dropper<br>Sample Requirement<br>1. Testing temperature: about 25℃ at normal temperature.<br>2. Take 5-10 ml of the sample, and take the supernatant for testing after standing.</p>