Features
- Freshwater GH/KH Test Kit
- General Hardness and Carbonate Hardness in one kit
- Complete Instructions Included
Description
Fast, Easy and Accurate Testing
Tests tap water and freshwater aquariums for general hardness (GH) and carbonate
hardness (KH). Helps detect stress on fish caused by rapid pH shifts, which
result from low KH levels and helps aquarists duplicate the natural habitat
of their fish.
What is Carbonate Hardness (KH)?
Carbonate hardness (also known as alkalinity) is the measure of carbonate
(CO32-) and bicarbonate (HCO3-) ion concentrations dissolved in water. These
minerals are present in municipal, well, and bottled spring 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 (50 ppm or less)
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 (= 200 ppm)
usually has a high pH. The Aquarium Pharmaceuticals KH (Carbonate Hardness)
Test measures KH in German degrees (°dKH). To convert °dKH to parts
per million (ppm), multiply °dKH x 17.9.
What is General Hardness (GH)?
General hardness is the measure of calcium (Ca2+) and magnesium (Mg2+) 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 (= 200 ppm) is high in calcium and magnesium, while
soft water (50 to 100 ppm) is low in these minerals. The Aquarium Pharmaceuticals
GH (General Hardness) Test measures GH in German degrees (°dGH). To convert
°dGH to parts per million (ppm), multiply °dGH x 17.9.
