Using Baking Soda in a Swimming Pool?

June 4, 2008

A jar of baking soda.I am told you can use baking soda in the swimming pool to keep the water clean and not use chlorine. Does anyone know how to use just the baking soda?


Diane from Columbus, GA


By Rick (Guest Post)
July 12, 20081 found this helpful
Best Answer

You MUST use a sanitizer in your pool. For most people, that means Chlorine. You can reduce the amount of chlorine you use by keeping evaporation down and ultraviolet light from the pool (which breaks down the chlorine) with a solar blanket. Having enough stabilizer also helps to reduce the Chlorine need.

You really need a decent test kit to determine how much of anything to add to a pool. If you have an above ground pool and drain it every year, you may be able to get by with the test strips that come 50 in a bottle from the local *-mart store. As indicated by the Arm & Hammer tip others posted, you can use baking soda to bring up the PH (reduce acidity) OR to increase alkalinity, but if you don't know where you are starting, you may only make things worse.

If you have an in-ground pool or don't drain your pool yearly, then a good, full test kit is essential for keeping the pool from growing things.


Personally, in my indoor pool (about 25000 gallons), I use a Bromine/Ozone sanitizing system and it is much less expensive and easier to deal with than the typical Chlorine regimen, once it is set up properly. I keep my pool in the high 80's most of the time, and the Bromine cycle makes it much easier to keep it properly sanitized.

Unfortunately, just calling a pool guy won't necessarily get you what you want either, because most of them are poorly trained and follow rules of thumb that just may not apply to your situation, depending on the type of pool, temperature, type of filter, amount of pool usage and pollutants added by the users (suntan oils, etc). Besides improper or insufficient training, many are in the business of selling the chemicals they use, so often want to put in a lot more than really needed.


If the reason you don't like Chlorine is because of the smell and eye irritation, the problem is probably not chlorine itself, but the Chloramines that result when Chlorine breaks down as it does it's job. The only ways to get rid of Chloramines is to super-chlorinate (super shock) the pool on a periodic basis, or by changing out a significant portion of the water. If your pool is outdoors and not covered, you may be increasing the residual chemicals because of evaporation. As water evaporates, only pure water goes away, not the residual chemicals. Adding more water only makes the level better, it doesn't reduce the residuals in the water. On the other hand, emptying the pool yearly (or making periodic, partial water changes) can reduce these chemicals, making the pool more comfortable. Of course, after any major water change, the water balance needs to be tested and adjusted as necessary. Typically, most people need to monitor at least Hardness (Calcium level), Alkalinity (buffering capacity) and PH (acid/base level). If you use stabilized chlorine, you should also check fur cyanates (CYA) to make sure it isn't getting too high, or it's water change time...


If any of the major items are out of balance, the comfort of the pool will be affected, and quite possibly the life of the pool and/or equipment as well.

I know it sounds like a lot to be aware of, but with a little reading you can get take care of your pool without needing a lot of support or spending a lot of money, and have a much more comfortable pool as well.

Good Luck
--Rick AH7H
rickf (at) rickfrazier (dot) com

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2 More Questions

Here are the questions asked by community members. Read on to see the answers provided by the ThriftyFun community.

August 2, 2018

I have a 10'x8' above ground pool. I want to use baking soda in place of bromide to increase the pH level. When adding baking soda to bring up the pH level in your pool, how much do you add to start with?

My pH level is way down!


Gold Post Medal for All Time! 677 Posts
August 2, 20180 found this helpful

Use 1 1/2 pounds per 10,000 gallons. Read more


Bronze Post Medal for All Time! 107 Posts
August 2, 20180 found this helpful

so here's a fun pool volume calculator:

it says a 10 by 8 should be at least 3000, if we average depth to about 5ft (you didn't specify either way)


so thats roughly 1/3 of 10k gallons

so i guess you use a cool 1/2 lb baking soda


Bronze Post Medal for All Time! 105 Posts
August 3, 20180 found this helpful

Your pool should hold around 3000 to 4000 gallons of water. Therefore, a pool this size will need 1/2 pound of baking soda to increase the Ph levels on the pool.

If you have 10,000 gallons of water in a pool then you add 1 1/2 pounds of baking soda to the water. I would start with 1/2 pounds in your pool and increase it just a bit if the Ph levels are still low.

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July 12, 2017

What exactly does baking soda do for a pool? I have a 16X48 above ground pool and I'm new to this world. There's so much to learn.


Gold Post Medal for All Time! 677 Posts
July 12, 20170 found this helpful

You can use it if the PH is low.
Here is a guide for pool use from Arm & Hammer.

July 13, 20170 found this helpful

U can use the bakingsoda if the pH of the water is below 6.5b(basic)


Gold Feedback Medal for All Time! 949 Feedbacks
July 13, 20170 found this helpful

Pool maintenance is important to be sure your pool is safe for your family and friends to use.
ThriftyFun has a lot of information from past questions that will probably be a big help. here is a link to their past postings and a link to information on using baking soda.


July 16, 20170 found this helpful

You stabilizer the pH with it and it can act as a water softener

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