HIGH RANGE PH TEST KIT The API® HIGH RANGE pH TEST KIT measures pH changes in marine aquariums, aquariums with African Cichlids, and very alkaline tap water. The API HIGH RANGE pH TEST KIT reads the pH of water within the high range of 7.4 – 8.8, and includes one bottle of test solution and one test tube. Sizes Contains 160 tests and includes 1 test bottle, easy-to-ready instructions, glass test tube and color chart