How Do you Get Rid of Algae in a Pool?

When opening your pool up next Spring, you might see an increase in algae that wasn’t there before. So what can you do to fix this issue? Below, we’ll be giving you a step-by-step on how you can get rid of pool algae.

What is Pool Algae and Why Does it Happen?

Pool algae are often green or yellow in colour and cling to the floor, walls and steps of the surface of your pool. Caused by poor filtration, water circulation or an imbalance of water and chlorine levels, there are numerous reasons why it can happen. However, if you see that your pool is filled with algae, there are a few steps you can take to reverse the state of your water. Here’s what you need to know about fixing the problem.

Getting Rid of Pool Algae

The first thing you’ll want to do is take your pool vacuum or cleaner and manually brush the surfaces to try and remove any algae buildup. While vacuuming, it’s important to have water refilling your pool to ensure that the water levels are never so low that the skimmer cannot work properly. Next, make sure you’re focusing on scrubbing every surface of your pool, including the floor and walls. Doing this manual work gives the chemicals that will come next a better chance to do what they need to.

Once you’ve done this, you should check your pH levels. Although typically, you want to keep your pool’s pH levels between 7 and 7.6, during this specific time, you’ll want the water to be on the lower end at around 7.2 pH. Because algae thrive in high pH environments, neutralizing your water allows for less of an opportunity for further growth. If your water’s pH levels are higher than this, you can use a pool chemical additive known as a pH reducer or pH minus to do this. It’s recommended to do this first thing in the morning and let it sit for the day. 

In the evening, you will need to “shock” your pool by super-chlorinating your water. You will want to do this in the evening, as the sun will play a huge role in the effectiveness of chlorine. Also, by doing this at night, you’re giving the chlorine a better chance to work away at the algae.

If you check on your pool the next day and see that it is still green, then continue with these steps again. If the water looks much less green than before, simply add Oxidizer first thing in the morning and liquid algaecide in the evening. If you find come morning your pool water is still green after adding these chemicals, you can redo the steps from days 1 and 2. 

You’ll know all these steps have worked when your water is about a cloudy grey/blue colour instead of green. This means the algae have successfully been removed. At this time, you should be adding a Pool Clarifier that will circulate for about 12 hours and ensure your pool filter is turned on. When you come back to your water, the remainder of the algae should be at the bottom of the pool in pieces that are easy to vacuum away. Once you have vacuumed the bottom of your pool and see no more traces of algae, it’s best to take a proactive step to ensure the algae doesn’t return. Once you’ve cleaned out your cartridge filters, you can add a Phosphate Eliminating product to your skimmer. This will be used as a preventative measure to ensure the algae doesn’t return. 

Once all of this is done, it’s important to recheck your pH levels. Because you’ve just put your water through a lot of ups and downs, you’ll want to make sure it’s back to a healthy pH balance before using the water.

Preventing Algae in Your Pool

You can do a few things as a pool owner to prevent algae from growing. For starters, you should be testing and balancing your water at least once a week. This is especially important to do after rainstorms. Another good practice is to run your pump for about 8 to 12 hours a day so that your water is constantly circulating. You can also help prevent algae by regularly washing and sanitizing your pool equipment, toys, and floaties.

Although pool algae aren’t always the easiest to deal with, this is pretty common, and by following these steps, you can be back to enjoying the clean, sparkling water of your pool before you know it.

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