How to clean a green pool in 7 steps

Have you noticed your pool more cloudy than normal and with a greenish tone? This is one of the most common situations that someone who owns or is in charge of a swimming pool has to face. Here are the causes and how to clean a green pool quickly, easily and effectively.

Why does the pool turn green?

The main cause why the water in your pool begins to acquire a greenish tone (to a lesser or greater extent) is due to the presence of microorganisms that, in turn, are responsible for the proliferation of algae.

If the water in these conditions is not treated properly, you can run the risk that the formation of algae increases and that the water becomes increasingly cloudy. In addition, algae are very likely to adhere to the pool walls, which can make cleaning tasks even more difficult.

Keep in mind that algae are constantly growing, so if you do not perform regular maintenance on your pool water, it is more than likely that it will become cloudy and green.

But, it is not all bad news. If your pool is in these conditions, the treatment is simple. Take note of the steps that are proposed below about how to clean a green swimming pool.

clean pool

How to clean a green pool step by step

Take a water test

To determine the extent of the problem, you need to check the chlorine and ph levels.

To do this, you can use any water analysis system, from the most traditional, such as the typical analysis kit, to more innovative methods that allow you to perform a pool water analysis remotely, with your mobile!

Once this is done, keep in mind that if the chlorine levels are less than 1 ppm, it is most likely that algae will appear that causes the greenish color in the water.

Regulate the ph of the pool

Depending on the results of the previous test, it is advisable to adjust the ph level to approximately 7.3 – 7.8, adding a ph reducing or increasing product as appropriate.

This step is important since, without a correct ph level, the products that you can going to use will not be effective enough.

Check and clean the filters

Check the status of the filters. Many times if these are dirty or clogged it can result in the water turning green.

You can even carry out a backwash to make sure it’s working properly before using any chemicals.

Clean the walls and bottom of the glass

In case the walls and bottom of the pool have been affected by algae, it is recommended that you clean these surfaces with a brush before adding the treatment products. When rubbed, the algae come off and it is easier to collect them with the help of a cleaner. In this way you can make the chemical products more effective.

Apply a shock treatment

A good chlorine- based shock treatment helps to remove algae and disinfect the pool. If the amount of algae in the water is high, the treatment should be repeated to prevent it from re-proliferating. Don’t worry if you notice cloudy water even after treatment. As it begins to leak, it will clear up. You can also repeat the shock treatment if the greenish color persists.

Use an algaecide

To enhance the effects of this cleaning, it is recommended supplementing the previous shock treatment with an algaecide and let it act for at least 24 hours.

Repeat the test

After the above steps, recheck the ph levels of your pool water which should now be normal.