When keeping freshwater fish and plants, the general hardness (GH) and carbonate hardness (KH) of aquarium water should match their natural habitat. The API® GH & KH TEST KIT helps you duplicate the natural habitat of your fish to prevent stress, keeping them healthy!
Sizes
Contains 2 test bottles, easy-to-ready instructions, and glass test
INSTRUCTION MANUAL:
https://apifishcare.com/pdfs/products-us/gh-kh-test-kit/api-gh-&-kh-test-kit-instruction-manual.pdf