Velda anti-Heron reflector 15 cm 128037

Maintaining the water hardness (GH value) is very important to allow your fish and plants to grow and develop and to provide them with a stable living environment. However, biological processes in the pond can reduce water hardness. An ideal hardness is between 8° and 12° GH. The Velda VT GH plus water improvement additive is a very effective way to increase the hardness of your pond water. The solution mainly consists of calcium, magnesium sulfate and other important minerals for a good living environment, so that growing plants and soil bacteria can develop freely. This 3.75 L VT GH plus is suitable for treating 22.500 liters of pond water.