Sera gH test

GH-test (SERA GH test) - for convenient and accurate testing (GH) of the total hardness level in water. Aquarium water contains different chemical properties, which largely depend on the water source. The two most important properties of water quality - are total and carbonate hardness. Total hardness (GH) of water - the sum of dissolved salts of calcium and magnesium. These salts have a direct effect on the metabolic process in fish, plants and microorganisms. Water with a high content of salts of calcium and magnesium is considered firm, with a low content - soft. Freshwater fish live in water with a total hardness of 6 to 16 dH.