How to Clean a Green Pool Using 3 Simple Steps

How to Clean a Green Pool Using 3 Simple Steps

Winning the war and the battle against algae, the primary causative agent of green pool is not always a sweet experience to so many pool owners. While some have succeeded in the fight, so many others have not been that lucky! In fact, many are scared at the mere sight of green or cloudy pool.

Because I have helped thousands of pool owners around the world won the fight against algae, I can also help you win. This guide is a proven 3 Steps Formula that has never failed to win against algae. It is victory without war. It will help to keep your pool’s water crystal clear and refreshed always only if you can follow me on this journey!

Green Pool

Green pool, disgusting! Right?

Why Algae in the first place?
The most acceptable explanations so far why algae will ever develop on your pool at all is when your pool’s sanitizer levels are too low or out of balance. If you haven’t been keeping tab with your pool’s water testing and water balancing, and or not adding enough chlorineor whatever type of sanitizer you use to your pool’s water, you’re practically laying out the foundation for algae to take possession of your much fancied pool. That’s not good enough!

Other reasons that could be attributed to algae infestations include change in weather conditions and blocked pool filter. Algae thrives in warm and humid environment, so changes in weather are also good indicators to alert you on the need to clean your pool. While clogged or blocked filter could give room to the incubation of bacteria and other debris that could contribute to the water discoloration.  

Step 1: Gather Your Weapons

We’ve always recommended as the best weapon to fight algae – liquid or granular chlorine or bromine – as powerful sanitizers for your pool because they kill algae very fast. The method of adding a super shock chlorine to your pool is referred to as ‘shocking’ in ‘poolonomics’ or pool’s terminology. Granular hypochlorite chlorine shocks are available in 1 lb. bags and shocking for everyday maintenance is one pound of calcium hypochlorite granular chlorine per 10,000 gallons of water, which of course, isn’t enough to give you victory without war.
Also needed handy in addition to chlorine are:

  • Algae pool brush
  • Test strips or liquid test kits
  • Pool pump
  • Filters
  • Chemicals e.g. pool clarifier

The 3 Stages of Algae Infestations:

  • Early stage – This is the weakest stage of infestations of algae in your pool and will not require much of chlorine to defeat. It appears in the form of light shade of green or teal green and sometimes starts as patches on the walls of your pool. At this early stage of infestation, double shock will be able to do the magic – 2 lbs. per 10,1000 gallons of water.
  • Matured stage – At this stage, the algae has fully developed and your pool color has turned to bright green. This is the most common and you will need to fight it with a triple shock – 3 lbs. per 10,000 gallons of water.

  • Advanced stage – When your pool has turned from deeper green to somewhat black, it simply means that the algae has taken over your entire pool and has been left unattended to for a longer period of time. This stage is the real deal and not very easy to get rid of even with quadruple shocks – 4 lbs. per 10,000 gallons of water. At this advanced stage of algae infestation on your pool, you would need to do more and prepare for the real fight.

Step 2: Strategize and Get Ready for Attack
Our strategy has been Attack! Attack!! Attack!!!
Meanwhile, before any form of attack, it’s recommended to brush the pool with algae brushto smoke the enemies out of hidings and as well keep the pool pump and pool filter running 24/7 until the water is completely cleared. The pH and alkalinity levels should be maintained between 7.2 and 7.6; and between 100ppm and 150ppm respectively.

Time to Attack

First Attack – Your first deadly attack is by shocking the pool in the night, when the enemies are presumed to be asleep. You should hit very hard at this first instance so that the enemies don’t have any chance of recovery. The pool shock contains a high level of chlorine of at least 70% that will kill the algae and as well sanitize the pool.

This is achieved by mixing thoroughly 1 lb. bag of shock in a bucket of clean water with a wooden paint stirrer and carefully poured around the perimeter of your pool. This is done while the filter is running to ensure even distribution of the shock, which should be kept running continuously until the pool is cleared.

Second Attack – If the algae infestation was in its early stage, your pool would be completely cleared after the first attack. In most cases, after shocking for the first time, it’s not always enough to clear a green pool as there are still chances of survival of some of the algae.

Don’t worry! Just prepare for a second deadly mop up attack still at night to finish off the job.

Third Attack – This third attack may not be necessary if the infestation was not advanced enough to the stage of having very dark green or black pool. At this stage, you should carry out test of your pool water to ascertain the concentration of your pool water. If you have followed our instructions carefully, after the first and second attack, that should be enough to kill all the algae in your pool.

In instances where you have a black pool or dark green pool from advanced and prolonged algae infestations, you may  need to drain the pool completely and acid wash the surface.    

Step 3: Clearing a Cloudy Pool
After the war, comes the peace! You have successfully killed all the algae, the enemies at this stage. Though your pool will become cloudy blue at this stage as a result of leftover residues such as high concentration of microscopic particles of dirt that were small enough to pass through pool filter unnoticed, it can easily be fixed. To clear the cloudy pool at this stage, we recommend you do the following:

  • Use a clarifier and follow every necessary steps as required
  • Do backwashing of your sand filter a few minutes. Do not backwash until the pressure rises 10 lbs. above the running pressure. Once cleaned, your filtration system will now work more efficiently
  • Check the chlorine levels and make any adjustments to the water when necessary. When the chlorine level is out of range, it prevents other pool chemicals from functioning optimally. Recommended range is between 1 and 3ppm (parts per millions)
  • Also, check the pH and alkalinity levels of your pool to make sure any chemicals you are using are functioning as they should. Recommended values for pH is between 7.2 and 2.6, while for alkalinity level is between 100 and 150ppm
  • Keep your filter running 24/7 until the pool is cleared.

Tightening the Nuts and Bolts

  • Keep in mind that algae grows very quickly and can retake over your pool from a few tiny spores. Never allow algae back on your pool. Chlorine kills algae fast!
  • A good algaecide will kill off the remaining tiny spores if any, drop them to the bottom of your pool; and continued treatment will prevent algae from coming back
  • Develop a good maintenance culture to keep your pool in shape always
  • Prevention they say, is better than cure!

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