Causes of Algae in Your Swimming Pool

Causes of Algae in Your Swimming Pool

Do you have a swimming pool and are constantly battling algae? If so, you’re not alone. Algae can be a huge annoyance and it seems to be getting harder and harder to keep them at bay. In this blog post, we will discuss what causes swimming pool algae and some of the best ways to get rid of it!

Poor Water Circulation

One of the most common causes of pool algae is poor water circulation. When your pool doesn’t have good circulation, it provides the perfect environment for algae to grow. Algae love stagnant, warm water and if your pool isn’t circulating properly, that’s exactly what they’ll get.

If you suspect that your pool’s circulation is poor, there are a few things you can do to test it.

  • First, take a look at your pool’s pump. It should be running for at least eight hours per day. If it’s not, that could be part of the problem.
  • Additionally, you can check the flow rate of your return jets. They should be strong enough to create a vortex in the pool. If they’re not, that’s another sign that your circulation is poor.

However, even if your circulation is good, there are other things that can cause pool algae.

High pH Levels

Swimming Pool pH Level

Besides poor circulation, high pH levels are another common cause of pool algae.

pH is a measure of how acidic or basic your water is and it’s important to keep it in the proper range. If your pH levels are too high, it can create an environment that’s conducive to algae growth.

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There are a few ways to test your pH levels. One of the most common is to use a test strip. You can also use a digital pH meter, but test strips are typically more accurate.

If your pH levels are too high, there are a few things you can do to lower them. The most common method is to add acid to the pool. This can be done with a chemical feeder or by pouring the acid directly into the pool.

You should always be careful when handling acids, as they can be dangerous. Make sure you read the directions on the packaging carefully and always add the acid to the water, not vice versa.

Low Levels of Sanitation in the Swimming Pool’

clean a swimming pool

It’s important to maintain proper levels of sanitation in your pool, as this will help to prevent the growth of algae.

There are a few things you can do to ensure that your pool is properly sanitized. The most important is to make sure that you’re using the right type and amount of chlorine.

You should also be sure to shock your pool on a regular basis. This will help to kill any algae that may be present in the water. If you find that maintaining proper levels of chlorine is difficult, you can consider to hire a professional swimming pool service in Malaysia. This is something that many pool owners do, as it can be difficult to keep up with all of the maintenance on your own.

Low Water Filtration Levels

Another common cause of pool algae is low water filtration levels.

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Your pool’s filter is responsible for removing dirt, debris, and other contaminants from the water. If it isn’t working properly, those contaminants can build up and create an environment that’s conducive to algae growth.

There are a few things you can do to ensure that your filter is working properly. First, you should backwash it on a regular basis. This will help to remove any dirt or debris that has built up in the filter.

Additionally, you should check the pressure gauge on your filter regularly. If the pressure is too high, it can be an indication that your filter needs to be cleaned.


As you can see, there are a few different things that can cause pool algae. By understanding what those causes are, you can be better equipped to prevent and get rid of it.

If you have any questions or need help with your pool, please don’t hesitate to contact us. We would be more than happy to assist you.

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