The API GH & KH Test Kit helps aquarists duplicate the natural habitat of their fish, as well as detect low KH levels, which can lead to rapid and wide pH shifts, stressing fish.

Use this kit to easily and accurately measure both the GH and KH in your aquaponics system or pond to create a more natural habitat. This test is suitable for fresh water.


When keeping freshwater fish and plants, the General Hardness (GH) and Carbonate Hardness (KH) of aquarium water should match their natural habitat. Water hardness is a measure of the dissolved mineral content of water. There are two types: the general hardness (GH) and carbonate hardness (KH). Adding tap water may increase water hardness.

Tip: KH can strongly influence your system's pH. If you add a pH adjuster to your system and the pH returns to its original level in a day or two, this is called ”pH rebound ” and it is caused by high KH (carbonate hardness).



SKU 125499
Barcode # 317163010587
Brand API
Shipping Weight 0.1900kg
Shipping Width 0.090m
Shipping Height 0.060m
Shipping Length 0.120m
Shipping Cubic 0.000648000m3
Type Test and Measurement


Limited Warranty - This product is a consumable and there for do not have a warrenty, If you belive this product have a manafcture fault our return policy allows you 7 days to contact us due to change of mind or any damage on arrival. Please contact us by using a Return Merchandise Authorisation form.

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