The API Pond Wide Range pH Test Kit quickly and accurately measures the pH of pond water, reading pH levels from 5.0 to 9.0. Makes 160 tests. Fast, easy and accurate Measures the pH levels from 5.0 to 9.0 Helps prevent injury to fish or damage to plants Prevents the harmful effects of too alkaline/too acidic pond water resulting from minerals found in tap water, high ammonia levels in the pond, rain runoff or overstocking of pond fish. Includes test solution, glass test tube w/ cap, color chart and instructions.