Increases the KH value (carbonate hardness) of your pond water. Recommended dosage of KH+: 25 ml/gr KH+ will increase the KH value of 150 liters water by 3-4 KH. (1 ltr/kg per 6000 liter). The required quantity of KH+ should then be dissolved in water in a watering can and poured over the surface of the water. Special notes: It is recommended that you also test the PH value of the water before using KH+. A high PH value may affect the solubility of KH+ so that the beneficial effect of KH+ will only be measurable after a few weeks have elapsed. KH+ and GH+ must not be added to the water at the same time. An interval of two weeks should be observed between adding each of these products separately.