Shake well before use. Using the dosing cap, add 50 ml Tetra Pond AquaSafe per 1,000 litres of pond water. For best results, dilute Tetra Pond AquaSafe in a container prior to use and then dispense the treatment evenly over the surface of the water. We recommend repeating the treatment regularly using half the initial amount every two to three weeks. Overdoses are not possible.