API High Range pH Test Kit can monitor high pH range from 7.4-8.8 in freshwater and saltwater to help maintain African cichlid, marine, and goldfish aquariums. All fish require a specific pH level to thrive. pH in an aquarium can fluctuate due to fish waste, addition of tap water, and the build-up of natural acids. With API High Range pH Test Kit, you can easily and accurately measure the pH level and maintain a healthy African cichlid, marine, and goldfish aquarium. This kit includes: a liquid dropper bottle, easy to read instructions on how to test and correct water conditions, 2 color chart, and glass test tube. 160 tests per kit. Shipping weight: 1/4 lb.