How to Treat Blackspot Algae

Need a hand with your pool? Contact your local Poolwerx for trusted advice and professional support from Australia’s pool care experts.

Timestamps:

• 00:00 - Diagnosing black spot algae in your pool

• 00:22 - Why black spot keeps coming back

• 01:02 - Water balance, circulation and temperature checks

• 01:35 - Setting pH and chlorine levels for treatment

• 02:04 - Scrubbing technique for pebblecrete and other pools

• 02:32 - Using copper-based black spot treatments safely

• 02:56 - Granular chlorine treatment for deep-rooted algae

• 03:20 - Ongoing prevention and when to call a Poolwerx technician

In this real-life poolside visit, our Poolwerx technician guides a pool owner through the expert steps we take to treat persistent black spot algae, one of the toughest forms of algae to remove. We explain what black spot algae is, why it’s so stubborn and the professional approach required to eliminate it properly.

We break down the key factors that allow black spot to thrive, including poor circulation, low sanitiser levels and warm water conditions. You’ll learn how our technicians assess water balance, check filtration performance and prepare the pool so treatment products can work effectively.

You’ll also see the correct scrubbing technique, especially for pebblecrete and other textured surfaces, to break through the protective outer layer of the algae. Our technician demonstrates how we use a copper-based black spot algaecide alongside a specialised granular formula with slow-release trichlor to reach the root of the algae and support long-term protection.

Whether your pool is pebblecrete, concrete or another finish, this guided walkthrough helps you understand the steps involved and when it’s time to call in the experts. We also cover prevention tips, how to maintain balanced water and why ongoing monitoring is essential to stop black spot from returning.

For expert advice, friendly guidance and professional support, reach out to your local Poolwerx. From in-store water testing to on-site service, we’re here to help you get the most out of your pool and enjoy more healthy, sparkling moments.