How to Clean A Green Pool In 24 Hours: As a pool owner, you desire your pool to be crystal clear at all times. However, that’s not always the case. There are times when, your pool turns cloudy or green due to algae growth, insufficient chlorine, pollution by pollen or too much copper. Irrespective of how or when your pool tuned green (e.g., uncontrolled algae growth when you were away on a journey), you can still get the pool back to its crystal-clear state in just 24 hours.

Now, you may be wondering how it is possible to clean a green pool in under 24hrs when your neighbor has been struggling with the problem for months. Well, the secret is in the cleaning technique. The procedure always determines the results. We are not talking some complicated process demanding the services of professional pool cleaners. You can restore your pool to its former glory in a day through simple DIY procedures.

Daily Pool Maintenance Tips

Before delving into how to clean a green pool, isn’t proper we took a more in-depth look into what causes the discolouration of the water in the first place? Ideally, your pool should always appear blue not green, so why the change?

The main culprit is a PH imbalance. Acidic water will erode a pool both metal and plastic components of any pool thus adding impurities to the otherwise clear water leading to a change in the color of water over time. On the other hand, alkaline water can’t kill algae and bacteria. Both the algae and bacteria flourish releasing a chemical that discolors the water.

A green pool can also be a result of a clogged filter. Whether the PH is okay, your filter must eliminate debris, dirt, and algae efficiently. Having a compromised pool filter turns your pool into a conducive environment for mold, fungi, and algae leading to a discoloration of the pool water.

Weather can also contribute to a green pool. As most microbes, algae do well in humid and warm temperatures. Provided the weather is conducive, algae growth might overwhelm your chlorine and even regular algaecide use.

PH Imbalance, clogged filter, and whether all lead to a green pool eventually. However, is there a way you could prevent your pool from turning cloudy or green? Yes, proper maintenance is the solution. Now, daily if possible:

  • Use the net to remove insects and leaves from the pool without forgetting to sweep away any algae growth you spot.
  • Clean the skimmer every morning, especially if you are neither using a pressure-side nor a robotic pool cleaner
  • Ensure there is the requisite amount of chlorine in the pool. Adjust accordingly, e., add chlorine to maintain a ratio of 1 – 3 parts per million.
  • Check the PH of your pool to ensure it is not less than 7.2 or more than 7.6. Correct this by adding acid or alkali as and when necessary.
  • Backwash your pool filter especially when you don’t suspect algae as the cause of cloudy
  • Only use recommended amounts of chemicals and check if they are effective

As you can see, the tips above will not take more than a few minutes of your time. Maintaining your pool may look involving and tiresome, but it is worth it. Moreover, regular pool management will save you time and money in the end.

Is it safe to swim in a green pool?

To determine whether it is safe to swim in a green pool, you must ask yourself how the pool got its color in the first place. As mentioned before, a green pool may result from different causes but mostly from unchecked algae growth. For algae to grow to the point of turning your pool from blue to green, there is no chlorine in the pool, or it’s it infective if present.

Now, algae itself is not as dangerous save for some skin irritation, but the absence of chlorine in your pool also points to the unchecked multiplication of bacteria and viruses in the pool. So, is it wise to expose yourself to bacteria and viruses only to spend a fortune treating resultant diseases? A green pool feels anything but fresh and exposes you to skin irritation if not infections; don’t risk it.

Moreover, since a green pool is useless to you, it is time you learn how to clean it in 24 hours.

✅ How to Clean A Green Pool In 24 Hours

Whether yours is an in-ground or an above ground pool, a green pool is a phenomenon you may not escape. Now, there are two ways to go about clearing your green pool, i.e., enlisting the services of a pool cleaning professional or using simple DIYs. While the former is expensive, the latter may take months especially if you don’t know the right procedure. So, how do you clear a green pool within the shortest time possible and in the most inexpensive way? Well, here is a step-by-step process to restore your pool back to its crystal-clear state in about 24 hours:

  • Test your water: Begin by testing your water to ensure the chlorine level, balance chemicals, and the PH are within range. Why is this important? Well, the right balance will speed the clearing process and allow chlorine and other chemicals to work at 100 percent efficiency.
  • Adjust the chemicals and PH: Start by cleaning the skimmer and filters to improve circulation and strong filtration. Then adjust the balance chemicals and use acid/alkali should it fall outside of the 7.2 -7.6 range. Allow your pool pump to run for 3 hours to affect the adjustments.
  • Get rid of debris: Chlorine tends to act on the debris hence won’t clear your water as you would want. So, take your time and get rid of as much waste as much as you can using an automatic pool cleaner (where possible). This step aims at allowing chlorine to work more effectively by eliminating the distracting debris.
  • Shock the pool: Begin by adding an algaecide to your water (per the instructions on the bottle) and run your pump for an hour. Algaecide is necessary if your above ground pool is very green and it helps by swelling the algae cells enough for chlorine to destroy them. After one hour, shock your pool with thrice the usual For instance, use 3 pounds of chlorine if you usually use 1 pound. This is to ensure no algae remains after the treatment hence speeding the clearing up of your green pool.
  • Brush the pool: Save for above ground pools where brushing may not be necessary, brush all the areas with algae clumped together. This helps chlorine to work on the algae better. Switch off the pump and wait for the algae to settle on the pool floor.
  • Vacuum the pool: Once the algae are on the pool floor, dip your automatic pool cleaner to remove the algae and other things that the inbuilt pool filtration system may not eliminate.
  • Run your pump for 24hrs: Running your pump continuously for 24hrs will speed up the clearing process. And, to get the best result faster, always clean your pool filter at least twice a day.

If you follow the above steps, your pool (in the ground or above ground) will move from green to cloudy to clear in about 24 hours. Now, as a precaution, don’t use your pool until the clearing process is over because the water is over chlorinated and may still have algae and bacteria.

What if the green pool won’t clear?

Cleaning a green pool is not a cheap undertaking. So, you expect that the hard your pool would clear ready for use. Unfortunately, there are cases where the shocking your pool doesn’t clear your pool, at least not in the time you expected. What should you do? Call a professional or give up on your pool? Well, follow these troubleshooting tips to before enlisting the services of a profession:

Cloudy Pool After Shocking: A cloudy pool even after running the pump for 24 hours could only mean two things; imbalance PH or an issue with your filter. Check if the pool water PH is 7.2 – 7.6. If the PH is within the recommended range, then your filter is the culprit.

If you are using a sand filter, be patient because the filter is slow and may take days to deliver a clear pool. A cartridge filter, on the other hand, should give results faster, and the failure may point to a faulty or a dirty cartridge. Remember, for a faster clearing, clean the cartridge filter at least daily. Now, if you are using Diatomaceous Earth (DE) Filter and your pool is still cloudy even after the clearing process, check if the pump is running on a long cycle. Otherwise, you may want to backwash or repair your DE filter.

Water still green even after shocking: Though the last thing you expect, your water may remain cleaning even after treating your water and running the filter for hours. What could be wrong with your pool? Well, the chief culprit here is overuse of a stabilizer. Stabilizers keep chlorine in a form that can resist ultraviolet rays from the sun. As crucial as these stabilizers are, though, they can build up to render the chlorine useless by locking up the free chlorine molecules. Moreover, since no chemical can lower the stabilizer, you may want to dilute your pool before starting to clean your green pool.

Apart from stabilizers, phosphates may be responsible for the undesirable results. Algae happen to depend on phosphates to bloom. Always clean your pool using an automatic clean to get rid of debris (it is from these that phosphate enters your pool). You may also use a phosphate remover if the levels are high and making it hard to clear your green pool.

There are times you when your pool is not clearing has to do with not adding enough chlorine. As mentioned before, you should add the usual amount thrice. Adding the standard quantity mean that not all the algae will die. The surviving algae will multiply to cover your pool in green which means you will take months to achieve what you could in 24hrs.

Last but not least, your pool may remain cloudy or green because you didn’t run the pump long enough. Always remember to leave the pump running for 24hrs for faster clearing.

To empty or to clean the pool?

There comes a time when cleaning a green pool is an exercise in futility. When your pool has too much stabilizer (cyanuric acid or Tri-Chlor) that you can’t see your hand inside the pool, you may want to empty instead of cleaning the water. Why? Well, none of the treatment described so far will rid your pool of stabilizers. Moreover, too much stabilizer renders chlorine useless; meaning algae will flourish unhindered.

It makes more sense refilling your pool with fresh water than trying over and over to clear your green pool without success. Starting over may be expensive but a better choice compared to engaging in a costly exercise you know will fail. So, drain the green water out of the pool and pump in fresh water. You can then measure the water PH and shock your pool before use. It will save you time and money in the end.


Your pool is one of your most important investments. Whether in reference to an in-ground or an above ground pool, pools costs thousands of dollars. The more reason you should invest both time and money in keeping yours clean all the times. Investing in an excellent automatic pool cleaner is the best option to keep your pool clean all year long.

If for some unavoidable reason(s), your pool turns green and unusable, there is a simple DIY you can follow to restore your pool. Understanding that algae are the primary cause of a green pool, your cleaning focus should be getting rid of algae using algaecide and proper pool shocking. For the best result, ensure the water PH, and chemical balance is within an acceptable range, the pool filter is functioning correctly, and you have a fast automatic pool cleaner.


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