KH Carbonate Hardness Test Kit - API

API - KH Carbonate Hardness Test Kit

The API KH Carbonate Hardness Test Kit tests fresh or saltwater aquariums for carbonate hardness (KH), and helps monitor water quality and prevent invisible water problems that can be harmful to fish and plants.

Carbonate hardness stabilizes aquarium pH, and can be used to determine the proper dose of pH buffers.


  • Accurately measures carbonate hardness in freshwater and saltwater aquariums
  • KH (Carbonate Hardness) stabilizes aquarium pH.
  • Use weekly for monitoring and when water or fish problems appear

What's Included?

  • 1 bottle of testing solution
  • easy-to-ready instructions
  • 1 glass test tube with cap
  • 1 color chart