Fast, easy, and accurate test solutions for pH, high range pH, ammonia, nitrite, and nitrate. A must for every freshwater aquarist to test tap water and aquarium water. Simply take a sample of your aquarium water, add test solution, and match against the included color chart for accurate test results. Regular testing, as part of routine maintenance, lets you monitor and maintain ideal aquarium conditions. Includes: Low range pH, high range pH, ammonia, nitrite, nitrate, 4 test tubes with snap-tight caps, and a test instruction booklet with color charts. Refills available for Ammonia, Nitrite & Nitrate and pH . Please click on "More Information" for instructions for use.