API(R) Freshwater DELUXE pH Test Kit The API Freshwater DELUXE PH test kit is an ideal kit you can invest in to easily detect any imbalance in the ph levels of the fresh water aquarium in your house. This easy to use kit allows you to adjust the ph levels in the pond in order to create a sustainable environment for the fresh water fish. Features: Detects pH levels Handy Precise readings Item Specifications: Size: Test kit of 250 tests Purpose and Benefits: A complete kit to measure and adjust pH. Tests pH levels from 6.0 to 7.6 and includes bottles of pH Up and pH Down to modify aquarium water pH to desired levels. Direction for use: Fill a clean test tube with 5 ml of water to be tested (to the line on the tube) Add 3 drops of pH Test Solution, holding dropper bottle upside down in a completely vertical position to assure uniformity of drops Cap the test tube and invert tube several times to mix solution Read the test results by comparing the color of the solution to the pH Color Card. The tube should be viewed in a well-lit area against the white area of the card. The closest match indicates the pH of the water sample. Rinse the test tube with clean water after use.