Colombo KH+ Pond Treatment Restores the carbonate hardness Stabilises the pH 100% natural pond treatment Fast acting formula KH+ from Colombo increases the carbonate hardness of the pond water and stabilises the pH. Carbonate Hardness, also known as KH is the measurement of the total amount of dissolved carbonates within the pond water. The correct Carbonate Hardness or KH level is extremely important for the health of fish and plants as a low KH can cause the pH to fluctuate which is very harmful for aquatic life in the pond. The ponds KH value should be between 6 and 8°DH. When the optimal KH-value is reached, stabilize the water values in your pond with Colombo Balantex. Colombo KH+ is available in the following sizes: - Colombo KH+ 1Ltr - Treats 7,000 Litres - Colombo KH+ 2.5Ltr - Treats 17,500 Litres - Colombo KH+ 5Ltr - Treats 35,000 Litres - Colombo KH+ 15Ltr - Treats 105,000 Litres Dosage: 1 Measuring spoon (=15 ml) per 200 litres of pond water increases the KH with 2°DH. Dilute the required amount in a bucket or watering can with lukewarm water and add to pond. Never poor directly onto plants. Test water quality at least once a month and correct if necessary.