Rain water in the pond

During autumn, winter, and even summer, a lot of rainwater will enter the pond . This results in fewer minerals in the pond water and a decrease in hardness. Rainwater is very soft and contains no minerals.

Hardness of the pond water

The hardness of pond water is expressed in the GH value. The GH value is expressed in German degrees of hardness (DH). A correct water hardness ranges between 8 and 12°DH. Rainwater is very soft, and heavy rainfall will therefore cause the hardness of the pond to decrease.

Effects of rainwater on pond plants

Oxygenating plants in the pond require high water hardness. The softer the water, the worse it is for the plants. Low water hardness hinders plants' growth in spring, causing the oxygen level in the pond to become too low. This promotes algae growth and causes the pond water to become cloudy. Add extra minerals to the water in the fall to help the plants grow well in spring.

Secret GH Plus and Mineral+

GH Plus and Mineral+ are highly effective products for increasing the total hardness of pond water. In GH Plus, this hardness is primarily created by calcium and magnesium sulfates. Mineral+ contains only natural minerals and trace elements, is environmentally friendly, and suitable for ecologically responsible pond maintenance. Both products provide important minerals. These minerals ensure the environment remains stable, aquatic plants grow, and soil bacteria can develop.

Testing pond water values

It's important to test your pond water regularly to ensure the pH, GH, and KH levels are correct, or if you need to intervene. We offer several test kits for sale in our webshop.