API GH and KH Test Kit

API test kit for General and Carbonate Hardness (GH and KH).

This kit measures both General Hardness (GH), the measure of calcium and magnesium ions in water, and Carbonate Hardness (KH), the measure of carbonate and bicarbonate concentrations.

Proper GH and KH levels are an important part of water quality and are necessary for the health of fish and the development and growth of aquarium plants.