The best method of killing pool algae is by keeping your pool clean and to attack algae spores before they can grow into full-fledged blooms. Circulation, proper sanitizer levels, routine brushing, and weekly shocking will get rid of the majority of spores before they flourish. But in some rare cases algae will overcome even these precautions. If your pool is one of these unusual cases, follow these easy steps to get your pool back to its original glory.
Test Your pH Balance
In cases where algae blooms are especially hardy, adjust your pH balance slightly higher than usual. A pH of between 7.8 and 8 should be enough to create a hostile environment for algae.
Check Your Filter
Clean or backwash your filter regularly. Remove debris and contaminants that may contribute to algae growth. Consider setting your filter to running 24 hours a day during algae season.
Scrub Your Pool
Cleaning your pool by scrubbing with a brush is always a good idea, especially if your pool walls are particularly porous. Some types of pool walls will become more porous over time. Wire brushes are best for use on plaster and gunite pools. Never use wire brushes on pools with vinyl walls, rather, use a nylon brush.
Shock the Algae
Using a strong algae shock treatment is among the best ways to keep algae from forming. Follow the directions for proper dosage. Large algae growths may need to be treated with as many as two or three extra doses over a period of 36 hours. The water may become cloudy after a large treatment. This will normally clear up after running the filter.
After Shocking, Brush and Vacuum
After treating large algae blooms, there may be floating masses in the water. You should brush and vacuum in this instance. Using a flocculent will cause particles to clump together for easier removal.