Aquarium GH Test Kits

Simple and reliable test kits for the monitoring of general hardness (GH) in aquariums.

General Hardness is a measure of the total amount of minerals dissolved in the water. Water hardness lies on a spectrum between ‘soft water’ or ‘hard water’ depending on the amount of dissolved minerals: the more minerals present, the greater the hardness. Hard water is responsible for the build-up of limescale.