How to Control Algae in Golf Courses & Greens

Q. We suffer with algae throughout the year on the Golf course. Can you please advise us on how we manage this?


Algal scum can cause chronic problems on greens, especially those with poor air circulation, compacted soils and wet areas. Algal growth is encouraged by extended periods of rainy, overcast and warm weather. Algal scums slow water infiltration, keep thatch wet for extended periods, and impede oxygen and other gas diffusion into and out of soils. As well as the danger of blocking watering systems, algae can affect the appearance of the ornamental ponds on courses.

If algae is a problem in your greens or in your water source follow this method to keep your waters clear and bright.First identify the algae present. Please use our guide here for more information. This page explains common algae within Australia.

Now calculate the volume of water to treat. Ignore depths below 1 metre. Please refer to our “Quantities“ page which explains the methods used to determine the amount of water to treat.
To calculate the amount of Coptrol needed. Use our online calculator here

a) If you are using run-off water from the environment
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.

b) If you are using treated effluent
Use 5 – 10mL  of Coptrol per 1000 litres of water (1 cubic metre) or 5 – 10 Litres per megalitre of water.
Dilute the required amount of Coptrol using a 1:10 or even a 1:20 Coptrol water dilution.

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.

by Aquatic Technologies
If you have any questions regarding looking after your dam or pond and what products are the most suitable for your situation, please read through the helpful articles on our site or feel free to contact our friendly team who can help you maintain proper health in your water body year round.
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