Attack Of the Algae: What’s Really Growing In Your Pool
Ever walked outside to find your pool looking more like a swamp than a backyard oasis? You’re not alone. Algae is one of the most common (and annoying) problems pool owners face — and it doesn’t take long for a perfectly blue pool to turn murky green.
Let’s break down what causes algae, how to prevent it, and what to do if it’s already taken over.
What Is Pool Algae, Really?
Algae are microscopic plant-like organisms that love warm, sunny, still water — which makes your pool the perfect breeding ground if it's not properly maintained. While not technically dangerous, algae is a red flag for imbalanced water and poor sanitisation, which can lead to harmful bacteria growth.
The Usual Suspects: What Causes Algae in Pools?
Low chlorine levels: Algae thrives when sanitiser levels drop, even slightly.
Poor circulation or filtration: Dead spots in your pool are algae’s best friend.
Warm temperatures and sunlight: A summer heatwave + lazy filtration = green pool.
Rain or organic debris: Leaves, dirt, and rainwater can introduce phosphates (algae food).
Neglected brushing and vacuuming: Algae clings to walls and hides in corners.
The Types of Pool Algae You Don’t Want to Meet
Green Algae: The most common type — turns your pool cloudy or bright green. Fast-growing but easy to fix if caught early.
Yellow (Mustard) Algae: Clings stubbornly to walls and equipment, and is resistant to normal chlorine levels.
Black Algae: The worst offender. Grows in concrete surfaces, has deep roots, and is tough to kill without serious scrubbing and shock treatment.
How to Prevent Algae in Your Pool
✅ Keep chlorine and pH levels balanced.
✅ Brush and vacuum regularly, especially in shaded areas.
✅ Run your pump and filter long enough each day (especially in summer).
✅ Shock the pool after heavy use or rainstorms.
✅ Use a phosphate remover as needed to starve algae of its food.
Already Got an Algae Problem? Here’s What to Do
Test the Water: Check chlorine, pH, and phosphate levels.
Brush Vigorously: Break up the algae's protective layer on walls and floors.
Shock & Floc the Pool: Use a heavy dose of chlorine or a specialised algaecide and flocculant
Let the Chemicals Work Their Magic: Chemicals will kill the algae and settle it to the floor. Repeat if necessary.
Vacuum Material: Vacuum to waste. Vacuuming to your filter will damage it.
Balance Chemicals: Test water again, add chemicals needed to balance water chemistry.
Run the Filter Constantly: For at least 24–48 hours after treatment.
Clean the Filter: Algae can get stuck in your filter and reintroduce itself later.
Pro tip: Green today? Call us right away. The longer you wait, the tougher the treatment.
Let Us Battle the Bloom for You
Fighting algae doesn’t have to be a DIY disaster. At Micks Pool Care we’ve got the tools, treatments, and know-how to rescue even the greenest pool. Whether it’s a full green pool recovery or weekly maintenance to keep algae away for good, we’ve got your back.
📞 Ready to reclaim your pool? Contact us today for fast, friendly help and enjoy crystal-clear water again — without the stress.