GH

See th.

The term "GH" is an acronym which means "global hardness" in French. In the field of aquarophilia, it is used to designate the amount of minerals dissolved in the water of the aquarium. More specifically, it measures the amount of calcium and magnesium present in water. These minerals are important because they are necessary for the growth and health of plants and fish.

The overall hardness of the water is measured in parts per million (PPM) or in German degrees (DGH). It is important to maintain an appropriate overall hardness in the aquarium, because too low or too high hardness can be harmful for plants and fish.

It is recommended to maintain an overall hardness of 8-12 ppm (or 4-6 DGH) in the aquarium. However, some species of fish and plants have different global hardness needs, it is therefore important to find out about the specific needs of each species before choosing the fish and the plants to be put in the aquarium.

There are several ways to control and maintain an appropriate overall hardness in the aquarium. You can use chemicals to increase or decrease the overall hardness of water. You can also use spring water, which has a naturally higher overall hardness, or osmosis water, which has a very low overall hardness. It is also possible to use rocks and decorations designed to add minerals to aquarium water.

It is important to regularly test the overall hardness of the aquarium water with an overall hardness test in order to ensure that it remains within the recommended limits. If you notice that the overall hardness of your aquarium water is too low or too high, you will have to take measures to adjust it. By maintaining an appropriate overall hardness in your aquarium, you can help guarantee the health and well-being of your fish and your plants.