How to Kill Green Pool Algae

green pool algae

With 110 degree days just over the horizon, there’s no better way to combat the heat and have fun, than to spend the day relaxing poolside. With towels in hand you head out to your pool…only to find that the water’s turned a murky green. Any hopes of having fun are then quickly dissipated – as you find yourself battling against green pool algae instead.

So what exactly is algae? Algae, according to the Merriam-Webster dictionary, is…

“A plant or plantlike organism of any of several phyla, divisions, or classes of chiefly aquatic usually chlorophyll-containing nonvascular organisms of polyphyletic origin that usually include the green, yellow-green, brown and red algae in the eukaryotes and especially formerly the cyanobacteria in the prokaryote.”

Green algae is the most common type of algae there is. As the name implies, it’s green, slimy and unfortunately grows extremely fast given the right conditions. Conditions such as warm temperatures, sunlight, out of balance water, and the presence of nitrates and/or carbon dioxide can quickly lead to your blue water’s demise.

Of course, the best way to avoid encountering a green pool, is to destroy the algae spores before they get the chance to develop into full-on algae blooms. Good circulation, proper sanitizer levels, routine brushing of the pools walls and floor, and weekly shocking can help you avoid problems with this type of algae.

If your pool’s water has become infested with algae, you have to find ways to fix it, before your able to use your pool. While algae itself does no harm to swimmers, it may harbor pathogens such a E-coli that can. Chlorine shock is one of the most effective treatments for algae.

Getting Rid of Green Pool Algae by Shocking

How Much Shock Will I Need?

  • 2 pounds of shock = 10,000 gallons of pool water
  • 4 pounds of shock = 20,000 gallons of pool water
  • 6 pounds of shock = 30,000 gallons of pool water
  • 8 pounds of shock = 40,000 gallons of pool water

Tips for Shocking Your Swimming Pool

  • Always use protective eye wear and gloves.
  • Always wear clothing you don’t mind getting ruined.
  • Add 1 pound of shock to a 5 gallon bucket of warm water that is 3/4 full (warm water dissolves shock faster than cold).
  • Always add shock to water NOT water to shock!
  • Using a wooden stick slowly stir in the shock. Make sure it is completely dissolved before proceeding.
  • Slowly pour the bucket of pre-dissolved shock into your pool on all sides. If you find some dissolved shock at the bottom of your bucket, simply dip your bucket into the pool water, and gently agitate the bucket before pouring the remaining shock into the pool.
  • DO NOT mix all the bags of shock together in one bucket.
  • Always shock in the evening or night time hours so the sun doesn’t burn off the chlorine. If you have a pool cover, keep it off on the nights you shock.
  • Use your pool skimmer or filtration system to help mix, speed up the oxidation process, and distribute the shock treatment for best results.

Happy Swimming!

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