API Liquid GH & KH Hardness Test Kit

An easy way to keep an eye on your GH and KH levels

At a glance...
  • Track levels of GH and KH
  • Comes with dropper bottles and test tubes
  • For freshwater use only
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SKU
SU_APILGHKH
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Details

What is the API Liquid GH & KH Test Kit?

The API Liquid GH & KH Hardness Test Kit is an accurate and easy-to-use liquid test kit that measures the general hardness (GH) and carbonate hardness (KH) of your aquarium’s water.

When keeping freshwater fish and aquatic plants, it’s recommended that GH and KH levels match those they’d experience in the wild. This kit helps you track your levels, keeping your fish happy and healthy.

The API Liquid GH & KH Hardness Test Kit is designed for freshwater use only. It comes with two dropper bottles containing the specially formulated GH and KH test solutions, two test tubes, and some step-by-step instructions.

What is carbonate hardness (KH)?

Carbonate hardness, also known as alkalinity, is the measure of carbonate and bicarbonate concentrations dissolved in water. These minerals are present in municipal, well, and bottled water. The level of carbonate hardness in tap and bottled water depends on the source of the water and the treatment processes it has undergone. Carbonate hardness helps stabilize pH in the aquarium. An aquarium with a low KH level will tend to be acidic. Aquariums with very low KH are subject to rapid pH shifts if not monitored carefully. Water with a high KH level usually has a high pH.

What is general hardness (GH)?

General hardness is the measure of calcium and magnesium ion concentrations dissolved in water. These minerals are present in municipal, well, and bottled spring water. The level of general hardness in tap and bottled water depends on the source of the water and the treatment processes it has undergone. Hard water is high in calcium and magnesium, while soft water is low in these minerals.

Why should I test for KH and GH?

Tap water rarely provides the water conditions necessary to maintain an optimal aquarium. Some tap water supplies have very low KH (below 3 °dKH), which has very little pH buffering capacity. This can contribute to wide pH swings in your aquarium.

Also, when water evaporates, it leaves behind hardness ions. Topping off with tap water simply adds more minerals to your aquarium, resulting in a steady increase in GH. It is therefore necessary to test the GH and KH frequently to monitor water quality and prevent stressful conditions for your fish from occurring.

For instructions about how to use this API Liquid GH & KH Hardness Test Kit, consult the step-by-step instructions provided in the box.

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