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Ponds & Water Features

API GH and KH Test Kit for Duplicating Freshwater Aquaponics/Plants/Fish Habitat


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API GH and KH Test Kit

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).



Product Code2423


Estimated delivery: 2-7 business days
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