KH Plus to increase the KH value of pond waterFor higher carbonate hardness. When the KH value of the pond water is too low, the pH value will also fluctuate during the day. This can cause fish diseases and algae growth. The optimal KH value for ponds is between 5 and 10. This also ensures optimal plant growth. If the value falls below 5 KH, then KH Plus increases it quickly without clouding the water. It is safe for humans and animals. Use 25 ml of KH Plus to increase 900 litres of pond water by