When to use? Over time the carbonate hardness (KH) level in your aquarium will drop. This reduces the pH and can lead to sudden fluctuations. Certain species of fish require a higher KH level and in turn a high pH so it is important to regularly maintain the correct KH level. How to use: Use 6g (1 level teaspoon) for every 100 litres of aquarium water to increase the KH by 2odKH. Dissolve the required amount in a small volume of aquarium water before adding to your aquarium. Do not increase the KH of your aquarium by more than 2odKH every 24 hours.
