How Much Baking Soda To Raise The pH Pool Level?

by James
(Clear Blue Pool eBook)

How many lbs. of baking soda do I need to add to my 24ft around 5ft deep swimming pool to raise the pH level?

It is at 0 right now says the test.

Thanks for the question James

For a 24X5 above ground pool, you looking at about 13,500 gallons. I will assume you have an above ground pool. First, I would encourage you to test the pH level again and be sure it's 0ppm. I use a Taylor FAS-DPD K-2006 pool test kit. This will give you the most accurate readings.

Water Testing Kit

Pool Water Testing

The pH of muriatic acid is approx. 4.5ppm. You might not be testing your pool correctly. Be sure you're testing properly with the right pool tester. Once this is done you can email back and give the pH level.


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pH & Alkalinity Low

by Julie Bruce
(Columbus, Ohio)

Some one told us to add pH Plus and Alkalinity Plus. They were both low when we tested them on some new strips we just bought.

Well, we have added a whole 4 1/2 pd bottle of the alkalinity up and whole 4 1/2 pound bottle of pH plus over the last three days trying to get the pH and alkalinity up.

It's not happening.

Our readings are chlorine 2.4, pH below 6.4, alkalinity is 0, hardness is 400, and the cyanuric acid is 0.

We have even added a shock it hoping it would help.

Any help would be appreciated.

Have a Great Day!


Thanks for the question Julie

First I'd encourage you to get a Taylor FAS-DPD K-2006 test kit and lose the test strips.

Pool Water Testing

Water Testing Kit

While the strips are more convenient, the DPD kit will give you the most accurate readings.

What size pool do you have?

Next, my guess on the pH and alkalinity up. They're probably both either sodium bicarb. or sodium carbonate.

You can use baking soda to raise both the pH and alkalinity, or use baking soda for the alkalinity and 20 Mule Team Borax to raise just the pH.

Here are the links to those:

Swimming Pool pH Levels

Pool pH

Pool Alkalinity

Total Alkalinity

They have the charts you need for your size pool.

Unless you have an extremely large pool, 9 lbs. of bicarb. would make some kind of dent in either the pH or alkalinity.

Have your water checked at your local pool store as well. Get them to test for everything:

Chlorine, CYA (cyanuric acid/stabilizer), pH, Alkalinity, Calcium Hardness, Metals (iron and copper), Total Dissolved Solids

Don't add calcium because because the hardness is on the high side.

You want to get some CYA into the pool. Right now you're using an un-stabilized form of pool chlorine. You need to get some Dichlor powder which is a stabilized form of chlorine, then use the Trichlor tablets to keep the cyanuric acid level in check.

Switch over to liquid chlorine once the cyanuric acid level has been reached.

Be careful when using Dichlor as it can get out of hand quickly. For every 10ppm of chlorine added with Dichlor, you'll raise the CYA by 9ppm. For every 10ppm of chlorine added with Trichlor tabs you'll raise the CYA by 6ppm.

Shock with Dichlor in the evening then retest the chlorine and CYA in the morning. Keep doing this until the pool has a CYA level between 30 - 50ppm.

Once you have this level, switch to liquid chlorine. Keep filtering 24/7 while this is going on. Take a water sample to your local pool store and have them run tests again.

Once you have that, come back and post your readings.


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