API KH Carbonate Hardness Fresh & Salt Water Aquarium Test Kit

The API KH Carbonate Hardness Test Kit is a key quality control tool that makes it one of the best aquatics marine supplements available to aquarists. The API KH Carbonate Hardness Test Kit is intended for evaluating carbonate hardness, or KH, in tap, fresh, and saltwater aquariums. It helps to stabilise pH levels and prevent dangerous fluctuations that might stress fish and expose them to illness and death.