How to Raise The pH Level in Your Pool (7 Easy Steps)

If the pH level in the swimming pool is too low, then there are various problems with the water quality, and damage to the pool occurs. But how can you increase the pH level in pool water?

Before increasing the pH level in the pool, the alkalinity must be measured and possibly optimized to 200 – 400 ppm. Then you need to calculate the water volume and apply pH-Plus granulate based on the data. The pH level increases by 0.1 if 100 g of pH-Plus are used per 10 m³ of pool water.

In this article, I explain how to increase the pH level to prevent clouding of the pool water and expensive damage to the equipment.

Increase the pH level in your pool

The pH level in the pool increases naturally. But that happens slowly and over a long period.

However, we continuously need a neutral pH level for clean pool water.

Therefore, if your pool has a low pH level, you shouldn’t wait for the pH level to rise on its own.

Instead, as a pool owner, you use tried and tested methods that work to raise the pH level in your pool.

I will explain how this works in detail to you in the following instructions.

1. Measure the alkalinity in the pool water

Before you start to increase the pH level in the pool water, you should first measure the alkalinity in the pool and, if necessary, optimize it.

The measurement of the alkalinity works with the following water tester.

Without digging deep into details: The alkalinity (acid capacity) interacts with the pH level.

Therefore the concentration of the acid capacity is crucial for the successful optimization of the pH level in your swimming pool.

If the total alkalinity in the pool is between 200 and 400 ppm, then nothing else needs to be done. Otherwise, read my guide on how to lower the alkalinity in your pool.

2. Measure the pH level in the swimming pool

It is best to use an electronic pH water tester to measure the current pH level in the pool.

Alternatively, you can measure the pool pH level with test strips or tablets.

But be careful: Test strips are prone to measurement errors.

In addition, you can only measure up to a pH level of 8.2 with water test strips, which hinders the dosage of the pH-Plus.

I preferably recommend an electronic tester for determining the water levels ​​in the pool.

3. Calculate the pool volume

For the dosage of the pool chemistry, it is necessary to calculate the pool volume.

The water content is calculated once and used for all further doses in the pool.

Use the following formulas for this:

  • Rectangular basin: length x width x average depth
  • Round pools: Radius² x 3.14 x depth (r² * π * h)

In a basin with an oval or free shape, the volume of water must be roughly estimated.

However, over time you get a sense of how much pool chemistry you need for your swimming pool or hot tub.

Tip: If the pool water was delivered, you could use this data to orientate yourself.

4. Wear protective equipment against acid splashes

The pH-Plus is an acid, and therefore it is important to wear protective equipment.

I recommend rubber gloves and goggles as the acid causes severe skin and eye irritation.

You should also protect your clothes from splashes – wear old clothes when using the pool chemistry.

5. Dose the pH-Plus to raise the pH level in your pool

The pH lifter is available from pool retailers as a powder or liquid solution. Both agents raise the pH level in the whirlpool and the swimming pool.

The required amount is printed on the product packaging, with which the pH level is corrected upwards by a specific value.

The pH level raises by 0.1 if 100 g pH-Plus are used per 10 m³ of pool water.

For example, if the pH level is 7.0 and you are aiming for a pH level of 7.4 in a 50 m³ pool, you must use 2 kg pH-Plus.

Dissolve the pH-Plus granules in a bucket or a measuring cup with water – the mixing ratio should be 10:1.

You will avoid acid splashes if you add the pH-Plus granulate to the filled water bucket first.

Tip: Always pour the pool chemistry into the water and never the other way around – the granules in the bucket dissolve faster with a stir bar.

The liquid solution can then be added to the pool while the circulation runs. This is important so that the chemistry is quickly distributed in the pool.

6. Let the filter system run in the pool

Let the filter system run through for 30 to 60 minutes so that limescale does not build up in tight spaces in the pool.

Theoretically, you can bathe in the pool immediately after using the pH-Plus, but I recommend waiting briefly until the acidic pool water has normalized.

Another water test shows you the current pH level of the pool water.

7. Check the water level ​​in the pool

Check the pH level regularly for four weeks – 1 to 2x/week – and use the pH-Plus granules again if necessary.

During this time, the pool pH should have normalized.

Regular water testers are sufficient for the daily test – these can be adjusted using the printed pH scale.

If the pool water is milky, chances are you’ve used too much of the pH plus.

Tip: After rain, it is often necessary to raise the pH level in the swimming pool. This is because rainwater is always acidic and lowers the pH.

Why is the pH dropping in the pool?

If there is a high percentage of free carbon dioxide in the pool, the water becomes acidic and corrosive.

The result: the pool’s pH level drops.

But what are the reasons that the pool pH drops?

  • Storms: When it rains, the swimming pool’s pH level drops because rainwater has a pH level of 5.5 to 5.8.
  •  Urine: The urine has a pH of 4.8 to 7.4. When your bathers abuse the pool as a toilet, the pH level drops.
  • Pool chemistry: Pouring too much cyanuric acid into the pool can lower the pH.

In the next chapter, you can read about the problems that arise in the pool when the pH level is well below the ideal value.

Tip: If the pH level constantly fluctuates up and down, this may be because the total alkalinity (acid capacity) is not optimal.

You can find helpful instructions on this topic in my blog.

Problems due to a low pH level in the pool

A low pH level in the pool is just as bad for the general water quality as a high level.

The following table shows you the symptoms and consequences if the pH level in the bathroom is below the optimum of 7.2 – 7.6.

pH level Water Effect
under 7,0 Acid Metal parts begin to rust, and joints are loosened, the consumption of disinfectant increases, burning and red eyes

As you can see, a low pH level in your pool should not be underestimated.

Neglecting can get quite expensive – so keep your pH levels in the ideal range of 7.2-7.6.

As a pool owner, it is your responsibility to measure the pH level in the pool every day and, if necessary, optimize it.

You can find an explanation of the best measurement methods in the blog article. Click on the link to access the post.

Questions and answers about increasing the pH level

You can find more interesting questions from my readers below.

If your question isn’t there, contact me on social media.

Can you use a home remedy to raise the pool pH?

The pool pH level can be raised with baking soda.

But the question is, how much soda is needed to correct the pool’s pH level upwards?

I’m talking about quantities in kg.

If the dosage is incorrect, a low pH level may become high. In this case, you have to initiate the following procedure with a pH minus to lower the pool’s pH level.

In general, however, I would advise against household remedies – for pool water treatment – as a low pH level is no joke. Source.

How often do you have to measure the pH level in a swimming pool?

If the pH levels ​​fluctuate continuously, it is best to take a daily measurement in the pool.

The procedure lets you recognize when the pH is too low, and you can take action to raise the pH level in your pool.

In this way, you prevent harmful consequences like cloudiness and damage to the expensive pool equipment.

Simple test strips are sufficient to measure the pH level in your pool water.

I only recommend digital water testers if you suspect that the pool pH level is too high.

In this video, you can see how to measure the pH level.

Do you have any further questions about raising the pH level in your pool?

Contact me at @contactswimfool on Twitter or Facebook – I’ll help you personally.

Have fun increasing the pool pH level.

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Hi. I'm Max Berg. I've been in the pool industry since 2015 and have always felt drawn to water. I'm the author behind, where I share my years of experience in pool maintenance and give helpful tips on keeping a swimming pool or hot tub clean. My tips reduce the costs of water treatment and protect the environment.

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