To enable this, create a smart collection named All Products and set the condition to 'Product price is greater than 0'. You can create a collection through the 'Collections' menu in Shopify admin. Or you can turn this section off through theme settings.
Each strip tests for Chlorine, Bromine, pH, Total Alkalinity, Total Hardness and Cyanuric Acid levels. Simple to use one-dip test with easy to read color comparator chart on vial.