Keep your fish healthy and thriving by testing your aquarium water's KH levels regularly with this easy-to-use API CARBONATE TEST KIT for freshwater aquariums. API CARBONATE HARDNESS TEST KIT helps prevent pH problems by stabilizing aquarium pH in fresh and saltwater aquariums. Fast, easy, and accurate testing evaluates KH levels in aquarium water, so that they may be corrected if too low or high.

• Contains one (1) API CARBONATE HARDNESS TEST KIT Aquarium Water Test Kit, including 1 bottle of testing solution, 1 color card and 1 test tube with cap
• Use weekly for monitoring and when water or fish problems appear