To keep a stable pond environment in which your fish and plants will thrive, maintaining the water hardness (GH value) is of the utmost importance, especially since biological processes in the pond water continually reduce the hardness. An ideal hardness should lie between 8-12° GH. The Velda VT GH plus pond additive is a very effective means of increasing the total hardness of your pond. The solution mainly consists of calcium, magnesium sulphates and other important minerals to ensure the environment remains stable so that growing plants and soil bacteria can develop freely. This 7.5 L quantity of VT GH plus is suitable for treating 45000 litres of pond water.
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