How to Prevent and Remove Pool Algae

Keeping your pool clean means learning how to prevent and remove pool algae effectively. Algae can quickly turn your clear pool water green, make surfaces slippery, and clog your filtration system. But with the right steps and products, you can keep your pool sparkling and algae-free all season long.

What Causes Pool Algae?

Algae thrive in warm, still, and unbalanced pool water. Common causes include low chlorine levels, poor circulation, infrequent cleaning, and warm weather. Even pools that look clean can develop algae if sanitizer levels drop.

How to Prevent Pool Algae

Preventing algae is easier than treating it once it appears. Here’s how to keep your pool free from algae:

Maintain Proper Chlorine Levels
Use liquid chlorine or chlorine tablets to keep chlorine levels between 1 and 3 ppm. This helps prevent and remove pool algae by killing spores before they grow.
Brush and Vacuum Weekly
Algae cling to walls and steps. Regular brushing and vacuuming remove debris and stop algae buildup.
Run Your Pump Daily
Circulate your pool water at least 8–12 hours a day. Good water flow prevents algae from settling.
Test and Balance Your Water
Keep pH between 7.2 and 7.6 and alkalinity between 80 and 120 ppm. Balanced water helps chlorine work effectively.
Use Algaecide When Needed
Adding algaecide weekly can give extra protection against algae, especially during hot or rainy weather.

How to Remove Pool Algae

If algae already appear, follow these steps to clear it out fast:

Shock Your Pool
Use granular chlorine to shock the water and kill algae.
Brush Thoroughly
Scrub pool surfaces where algae grow.
Run the Filter
Keep your pump running 24–48 hours after shocking to clear dead algae.
Clean Your Filter
Backwash or clean filters to avoid recontamination.

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