How to Lower Ph in Pool Naturally

By Greg Jarvis | Last Updated: September 7, 2022

If your pool chemistry is out of balance, it requires a lot of work to get them back on the right level. And the pH levels are included in this.

In fact, if your pool has a high pH level, it will affect everything, and that includes chlorine effectiveness.

But there are lots of ways that you can do to correct it, and this guide will help you do that. This guide includes steps and methods on how to lower the pH in your pool.

Pool owners should be aware that figuring out how to balance the pool chemistry is quite essential. How to lower pH in the pool naturally is very helpful.

The pool’s pH should be between 7.2 and 7.8. The normal pH of pure water is 7. So, if your pool pH is low, then it is considered as acidic and can cause skin corrosion or irritations to the pool system you are using. If your pool water has a pH higher than 7, then it is in an alkaline state, and it will likewise cause discomfort to swimmers.

Correcting the pool pH can be done in two ways organic and natural methods. This guide will outline the steps on how you can lower the pool water pH naturally.

How to Lower pH in a Pool Naturally

Installing a Distilled Water System

In areas with naturally hard water, this method could help you a lot with lowering the pH of your pool water. Hard water is mostly alkaline, so you need to deal with it accordingly. We all know that distilled water is pure and does not contain enough minerals and metals to raise the pH unnaturally.

The only drawback to this process is that it is hard to bring the water from inside the house to the pool area. This is true when it is time to reduce the water in your pool and fill it with distilled water, but it’s worth it. Use pH test strips to determine if the pH has lowered by adding distilled water.

Heating the Water

The solubility rating of hot water is higher, which means it can easily dissolve natural substances easily, like calcium carbonate. The compound can increase the acidity of the water and lower the pH levels.

Just Leave the Water Alone

One way of lowering the pH in your pool water naturally is not to do anything with it. Changing the water could sometimes give you bad results. Minerals naturally decrease the pH build-up over time. If you just let the process go naturally, it will go down without changing anything. Check the pH of your pool water using the test strip. If it gets too low, then the recommended pH changes the water.

Also, read best chlorine tablet for pool.

Direct the Downspouts From Your House to the Pool

This method could be a challenging technique, but it is possible. You can lower the pH naturally by directing downspouts from the house to your pool. Once the pool becomes full because of the backwash, it throws out water. Since the rainwater has 5.6pH, it can lower the pH naturally.

The low alkalinity is the primary concern with rainwater. If you choose this method, you will need to check your pool continually. Make sure that you can balance it so that the chlorine will not destroy the pool and the pipes in the system. But, if you are living in an area where your source of water is expensive, rainwater could be the best way to cut on the water bill.

Other Methods

When it comes to lowering the pH of pool water, you will need to add something to it. Some use sulphuric acid, granular sodium bisulfate, or hydrochloric acid as additives to your swimming pools.


Regulating the pH by adding CO2 into the pool water is sometimes done. Although there are some that you can use in your pool water, it is best to check the labels. Just make sure that you know what you are adding to the water. If not, you could end up having not only poor water quality but damage to the liner and the plumbing.  Also, you can put the swimmer’s life in danger.

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