How to Use Coptrol in Farm Dams and Ponds

Farm dams and ponds very often develop algal problems.  They can range from physical inconvenience such as blocking of screens and filters, pumps and irrigation equipment to stock losses from toxicity caused by accumulation of blue green algae.
The problems are aggravated where water is enriched by nutrient run-off, so heavily fertilized areas are a particularly good source of algal nutrients.
In drought seasons where water levels are low, algae may be a major problem also.
If algae is a problem in your dam or pond follow this 5 step method to keep your waters clear and bright.

1.  First identify the algae present. Please use our guide here for more information. This page explains common algae within Australia.

2.  Now calculate the volume of water to treat. Ignore depths below 1 metre. Please refer to our “Quantities” page to calculate the amount of water to treat.

3. Next calculate the amount of Coptrol needed. An easy way to calculate is:

• If the algae is fine and free floating use 2 mL of Coptrol per 1000 Litres (1 cubic metre) of water. That is equivalent to 2 Litres of Coptrol per 1000 square metres of surface area.

• If the algae is long and stringy use 5 mL per 1000 litres of water (1 cubic metre) or 5 Litres per 1000 square metres of surface area.

4. Dilute the required amount of Coptrol using a 1:10 or even a 1:20 Coptrol water dilution.

5. The best application method is by spraying. Apply on a sunlit wind free day when algae first appear. If this is impractical, please refer to our “Application” page on how to apply Coptrol.