Each month, add 4 scoops (600 g assuming one scoop equates to 150 g) per 5,000 litres of pond water (KH increases by approximately 4°dH). Repeat if required, especially after heavy rainfall or before using anti-algae products and remedies. Overdoses are not dangerous.
KH increase per 5,000 l of pond water: 600 g (4 scoops) approx. 4°dH | 300 g (2 scoops) approx. 2°dH | 150 g (1 scoop) approx. 1°dH