How to Get Rid of Algae in the Pool?

Algae in a pool are quite a nightmare for all pool owners. It’s the most common issue and it seems to appear without warning. Algae grow and multiply extremely quickly and this makes the situation worse for both pool owners and swimmers.

And let’s be honest--the sight of cloudy pool water is very uninviting for swimming!

An algal bloom might happen in a matter of few hours and can occur in either sun or shade, although most algae require light for fast growth. In the presence of light, they photosynthesize and spread rapidly.

What appears as a tiny microscopic issue can quickly turn into a pool-sized problem, so it’s not wise to ignore this tiny nuisance until it gets out of control.

Algal spores can easily be introduced into the pool by air, on swimsuits of swimmers, or the tools used to clean the pool. Almost anything can become a carrier and introduce algal spore into the pool.

Be vigilant for the algal blooms in your pool

Typically, there are three kinds of algae (green, yellow and black) that grow in pool water, and they will cause discoloration or cloudiness. If the pool water is discolored then it’s a sure sign that there is algal growth.

Algae also encourage bacterial growth in your pool, making the situation worse.

Even if you are vigilant, maintaining the pool water chemistry will not always control algae getting into the pool by wind, high humidity or another source. Once that happens, you must be aggressive about its removal as soon as the first signs of growth appear.

Clear the pool water by getting rid of the algae

Pool shock is the best way to clear pool water. More aggressive treatment will be required to treat certain algal strains. Black algae are the most stubborn strains to get rid of. 

    • Manual vacuuming is a more effective option
      Manual vacuuming works better in cleaning algae than automatic pool cleaners. When you manually vacuum directly, it prevents recirculation of contaminated water and bypasses the filter.
    • Scrub Algae from your Pool
      Scrubbing helps the sanitizer work more effectively. Pay attention to every nook and corner while scrubbing. It’s better to scrub the tougher spots first because once you start scrubbing the water is going to get cloudy. Use a stiff brush.
    • Maintain the water Chemistry to prepare it for Shock Treatment
      Test the pH and alkalinity and balance the water chemistry. Your sanitizer will be more effective if the water chemistry is balanced. Pool shock will not be very effective if pH is high and alkalinity is low.
    • Give Shock Treatment
      Shocking your pool with calcium hypochlorite is a good way to kill the algae. Determine the dose by the package instructions. Different kind of algae will need a different dose of shock.

      For green algae you have to double the quantity of shock, yellow and dark green algae will need three times the amount and for black algae multiply by 4 to get the required amount of shock. Use un-stabilized chlorine.

    • Filter the Residues out of the Pool
      Pool water will turn cloudy and have a blue tinge after the shock has killed the algae. Add water clarifier and run the filter for a minimum of eight hours to clear it.

      After filtering the pool water test the water again to balance the water chemistry.Be sure chlorine levels are normal before you open the pool for the swimmers.

    • Clean the Filter
      After all the hard work to get the algae out of your pool, it’s very important to clean the swimming pool filter cartridges. Otherwise, in no time at all, the algae particles stuck in the pool filters will start another bloom.

      Deep cleaning of the filter cartridge is a must. You can accomplish this by soaking the pool filters in diluted muriatic acid overnight.If it’s too dirty, you may want to opt for pool filter cartridge replacement.

In the end

When you notice algae in your pool, don’t wait too long to clean it. Waiting too long will take more time and resources to get rid of it. And even after all the cleaning and removal is done, if a small number of algal spores are left behind, they will be back again.

A chemical free alternative for Algaecides to prevent algae from growing back. Though algaecide can kill algae, it’s more effective as a preventive measure.