API GH/KH Freshwater Test Kit API GH/KH Freshwater Test Kit measures general hardness and carbonate hardness in freshwater aquariums, helping aquarists match water conditions to fish and plant needs while monitoring pH stability. API GH/KH Freshwater Test Kit for General and Carbonate Hardness Freshwater fish and plants often come from environments with very different mineral levels. The API GH/KH Freshwater Test Kit helps measure both general hardness and carbonate hardness so aquarium water can be monitored against the needs of the livestock being kept. Freshwater Hardness Testing for Fish Plants and pH Stability Measures general hardness, also known as GH. Measures carbonate hardness, also known as KH. Designed for freshwater aquariums and tap-water checks. Helps aquarists duplicate more suitable water conditions for freshwater fish. Helps detect low KH levels that can allow rapid pH shifts. Useful for planted tanks, community aquariums, cichlid systems, and species-specific setups. Liquid testing format provides more detailed hardness monitoring than a quick visual estimate. API GH/KH Freshwater Test Kit Use Notes Product type: liquid freshwater hardness test kit Tests: GH and KH Use for: freshwater aquariums and source-water testing KH importance: helps stabilize pH against sudden swings GH importance: reflects dissolved mineral content in the water Test regularly when adjusting water hardness or keeping hardness-sensitive fish and plants. API GH/KH Freshwater Test Kit Directions Rinse the test tubes before testing. Fill each tube with aquarium or tap water according to the included instructions. Use the GH test bottle for the general hardness test. Use the KH test bottle for the carbonate hardness test. Add drops as directed and count drops until the required colour change is reached. Record results and compare them to the preferred range for the fish or plants being kept. Rinse test tubes after use and do not pour test contents back into the aquarium. What's Included One GH test bottle One KH test bottle Two capped test tubes Instructions
