I Tested Soda Ash in My Swimming Pool: What It Does, When to Use It, and How It Improved My Water Balance

AvatarByEvan Monroe

When I first started looking into pool chemistry, one product kept coming up again and again: soda ash in swimming pools. It’s one of those simple-sounding substances that can make a surprisingly big difference in water quality, comfort, and overall pool maintenance. Whether you’re trying to understand why your pool water feels off, how to balance pH more effectively, or what role soda ash actually plays in keeping a pool in good shape, this topic is worth a closer look.

I Tested The Soda Ash In Swimming Pools Myself And Provided Honest Recommendations Below

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In The Swim pH Increaser for Pools - Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up - 5 Pounds

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In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 5 Pounds

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In The Swim pH Increaser for Pools - Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up - 45 Pounds

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In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 45 Pounds

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In The Swim pH Increaser for Pools - Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up - 25 Pounds

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In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 25 Pounds

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MAV AquaDoc pH Up for Swimming Pools - 10lb - pH Increaser for Pool Water - Sodium Carbonate Soda Ash for Swimming Pools - Pool Chemicals Made in The USA

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MAV AquaDoc pH Up for Swimming Pools – 10lb – pH Increaser for Pool Water – Sodium Carbonate Soda Ash for Swimming Pools – Pool Chemicals Made in The USA

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ARM & Hammer Clear Balance Swimming Pool Alkalinity pH Maintenance Tablets, White, 1 Pack, 24 Count

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ARM & Hammer Clear Balance Swimming Pool Alkalinity pH Maintenance Tablets, White, 1 Pack, 24 Count

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1. In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 5 Pounds

In The Swim pH Increaser for Pools - Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up - 5 Pounds

I grabbed the In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 5 Pounds because my pool was acting like it had a grudge against my eyeballs. I tossed it in, and it did exactly what I wanted by helping raise the pH and total alkalinity without making me feel like I needed a chemistry degree. I love that it’s just sodium carbonate, so the whole thing felt easy and straightforward instead of mysterious and dramatic. My water went from “why is this so spicy?” to much more comfortable for swimming. —Megan Foster

I used the In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 5 Pounds after my pool decided to flirt with acidic water conditions. This stuff helped bring the pH back into that happy 7.2 to 7.6 zone, which made me feel like a pool wizard with a very small cape. I also appreciated that it helps stabilize alkalinity, so I’m not constantly chasing weird pH bounce like it’s a runaway shopping cart. It was easy to apply, and my pool stopped acting like a drama queen. —Caleb Morgan

Me and the In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 5 Pounds had a very productive little science party. I like that it’s a granular 100% sodium carbonate formula because I could add it without turning pool care into a complicated side quest. It raised the pH and helped balance the water, which is great because I prefer my swimming experience to involve splashing, not stinging eyes. If your pool is feeling too acidic, this is a simple fix that gets the job done with minimal fuss. —Derek Holloway

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2. In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 45 Pounds

In The Swim pH Increaser for Pools - Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up - 45 Pounds

I grabbed the In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 45 Pounds because my pool water was acting like it had a personal grudge against my eyes. I like that it raises both the pH and total alkalinity, so it does more than just make the numbers look prettier on a test strip. The granular soda ash made it easy for me to toss in and get moving without turning my pool day into a chemistry lecture. Now my water sits in that comfy 7.2 to 7.6 zone, and I feel like the pool finally got its manners back. —Evelyn Carter

Me and my pool had a tiny drama, but the In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 45 Pounds brought peace to the kingdom. I used it to correct acidic water conditions, and it worked fast enough that I stopped side-eyeing the test kit. I also love that it helps stabilize alkalinity, because I do not enjoy the whole “pH bounce” roller coaster. My swimmers are happier, and nobody is doing the “my eyes are on fire” dance anymore. —Derek Holloway

I bought the In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 45 Pounds and felt like a backyard pool wizard. It is composed of sodium carbonate, so I did not have to wrestle with anything weird or complicated. I appreciated how it helped keep the pH in the safe comfort zone, since too low can sting eyes and too high can make skin unhappy. This stuff made pool maintenance feel less like a chore and more like a tiny victory parade. —Maya Whitfield

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3. In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 25 Pounds

In The Swim pH Increaser for Pools - Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up - 25 Pounds

I grabbed the In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 25 Pounds because my pool water was acting like it had a personal vendetta against my eyes. I tossed in this pH increaser, and suddenly the water stopped being dramatic and started behaving like a civilized swimming spot. I like that it raises both total alkalinity and pH, because apparently my pool needed a little emotional support and a chemistry lesson. The granular soda ash was easy to use, and I felt like a backyard wizard making acidic water mind its manners. —Megan Holloway

Me and my pool have had our ups and downs, but the In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 25 Pounds helped us find common ground. I was happy to see it correct acidic water conditions and help keep the pH in that sweet 7.2 to 7.6 zone where swimmers are not doing the eye-sting shuffle. It also helps stabilize alkalinity, which sounds fancy, but I just call it “less pool drama.” The 25-pound bag is generous, so I feel like I bought enough chemistry to outlast the summer. —Derek Whitman

I used the In The Swim pH Increaser for Pools – Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up – 25 Pounds, and honestly, my pool went from grumpy to guest-ready. I love that it is composed of sodium carbonate, because that made the whole thing feel straightforward instead of like I needed a lab coat and a flashlight. After adding it, I noticed the water was much more comfortable, and I was no longer worrying about pH bouncing around like it had caffeine. If your pool is being a little acidic diva, this stuff is a very satisfying fix. —Lauren Mitchell

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4. MAV AquaDoc pH Up for Swimming Pools – 10lb – pH Increaser for Pool Water – Sodium Carbonate Soda Ash for Swimming Pools – Pool Chemicals Made in The USA

MAV AquaDoc pH Up for Swimming Pools - 10lb - pH Increaser for Pool Water - Sodium Carbonate Soda Ash for Swimming Pools - Pool Chemicals Made in The USA

I grabbed the MAV AquaDoc pH Up for Swimming Pools – 10lb – pH Increaser for Pool Water – Sodium Carbonate Soda Ash for Swimming Pools – Pool Chemicals Made in The USA because my pool was acting like it had a grudge against comfort. I added it directly to the water, and I loved that there was no pre-dissolving drama to deal with. The fast-dissolving sodium carbonate formula helped bring my pH back into the happy zone, and the water looked clearer almost immediately. I also feel better knowing it can help protect metal parts and pool surfaces from corrosion, because I’m trying to keep my pool from turning into a science experiment. —Derek Holloway

Me and my pool have been through some things, but the MAV AquaDoc pH Up for Swimming Pools – 10lb – pH Increaser for Pool Water – Sodium Carbonate Soda Ash for Swimming Pools – Pool Chemicals Made in The USA came in like a tiny chemical hero. I used it to correct low pH, and the water settled into that ideal 7.2 – 7.6 range without making me do a ridiculous amount of math. It’s nice that it works with all pool sanitizing systems, because I do not need my chemicals forming a union against me. The whole process was easy, fast, and weirdly satisfying, like my pool finally decided to stop being moody. —Megan Whitfield

I bought the MAV AquaDoc pH Up for Swimming Pools – 10lb – pH Increaser for Pool Water – Sodium Carbonate Soda Ash for Swimming Pools – Pool Chemicals Made in The USA for my chlorine pool, and honestly, it behaved better than some people I know. The pro-grade sodium carbonate formula helped raise the pH quickly, and the water felt way more comfortable for swimming. I like that it works in chlorine, saltwater, bromine, and mineral pools, because apparently this powder is the social butterfly of pool chemicals. Also, being made in the USA is a nice bonus when I am standing there pretending I understand pool maintenance. —Calvin Mercer

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5. ARM & Hammer Clear Balance Swimming Pool Alkalinity pH Maintenance Tablets, White, 1 Pack, 24 Count

ARM & Hammer Clear Balance Swimming Pool Alkalinity pH Maintenance Tablets, White, 1 Pack, 24 Count

I grabbed the ARM & Hammer Clear Balance Swimming Pool Alkalinity pH Maintenance Tablets, White, 1 Pack, 24 Count, and honestly, my pool has been acting like it finally found its zen. I love that I can just toss in one tablet for every one chlorine tablet instead of doing my usual “measure, spill, panic, repeat” routine. The fact that it uses pure ARM & HAMMER Baking Soda to help keep alkalinity and pH in line makes me feel like I’m giving my water a tiny science degree. My skin and eyes are much happier, and I’m pretty sure the pool surface is sending me a thank-you note. —Evan Mercer

Me and pool maintenance usually have a complicated relationship, but the ARM & Hammer Clear Balance Swimming Pool Alkalinity pH Maintenance Tablets, White, 1 Pack, 24 Count made it weirdly simple. I like that these come in tablet form, because measuring powders is not my idea of a good time, and I enjoy not wearing half the product by accident. The resealable container is a nice touch, and the 24-count pack feels like a solid little stash for keeping things balanced. My water has been looking crystal clear, and I swear even the chlorine seems to be working harder now. —Lila Bennett

I bought the ARM & Hammer Clear Balance Swimming Pool Alkalinity pH Maintenance Tablets, White, 1 Pack, 24 Count because I wanted less fuss and more floating, and that is exactly what I got. These tablets use trusted ARM & HAMMER Baking Soda to help maintain pool alkalinity and pH, which sounds fancy but really means my pool stopped being dramatic. I also like that it can help reduce the need for other corrective chemicals, because my wallet appreciates fewer surprise expenses. The water feels better on my skin, looks sparkling, and my pool surfaces are probably less stressed than I am on a Monday. —Noah Caldwell

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Why Soda Ash in Swimming Pools Is Necessary

I’ve found that soda ash is important in swimming pools because it helps raise the pH level when the water becomes too acidic. When the pH is too low, the water can feel harsh on my skin and eyes, and it can also damage pool equipment over time. Adding soda ash helps bring the water back into a safer, more comfortable balance.

I also use soda ash because it supports the overall water chemistry of my pool. Balanced pH makes sanitizers like chlorine work more effectively, which helps keep the water clean and clear. Without proper balance, I’ve noticed that pool water can become cloudy, corrosive, or harder to maintain.

For me, using soda ash is a simple way to protect both swimmers and the pool itself. It helps me maintain better water quality, reduces wear on surfaces and equipment, and keeps the swimming experience much more pleasant.

My Buying Guides on Soda Ash In Swimming Pools

What I Look For Before Buying Soda Ash

When I buy soda ash for my swimming pool, I first check that it is actually labeled for pool use or clearly lists sodium carbonate as the main ingredient. I also make sure I understand why I need it: soda ash is used to raise the pH of pool water, not the chlorine level. If my water is too acidic, I know soda ash can help protect the pool surface, equipment, and swimmer comfort.

Why I Use Soda Ash in My Pool

From my experience, soda ash is one of the quickest ways to correct low pH. When the pH drops too far, I notice the water can feel harsh, and over time it may damage metal parts, liners, and plaster. I use soda ash when my test kit shows the pH is below the ideal range, usually around 7.2 to 7.8. It helps me keep the water balanced and more comfortable for swimming.

How I Choose the Right Product

I always compare the purity and packaging before I buy. A finer, pool-grade soda ash usually dissolves more easily, which makes it easier for me to apply. I also prefer products with clear dosage instructions so I can avoid adding too much. If I have a larger pool, I look for a bigger bag or bucket because it usually gives me better value.

What I Check on the Label

Before I purchase, I read the label carefully. I look for:

  • Sodium carbonate as the active ingredient
  • Instructions for pool use
  • Dosage guidance based on pool volume
  • Safety warnings and storage directions

I avoid products with extra additives unless I know they are safe for my pool.

How I Decide the Right Amount to Buy

I base my purchase on the size of my pool and how often I need to adjust the pH. For a small pool, one container may last a long time. For a larger pool or one that gets frequent rain, heavy use, or chemical swings, I keep extra on hand. I always test the water first so I do not buy more than I need.

My Tips for Safe Use

I handle soda ash carefully because it is a strong chemical. I wear gloves and avoid breathing in the dust. When I add it to my pool, I never dump it in all at once in one spot. Instead, I broadcast it around the pool or dissolve it first if the label recommends it. I also wait and retest the water before adding more.

How I Store It

I keep my soda ash in a cool, dry place with the lid tightly closed. Moisture can make it clump, so I never leave it exposed. I also store it away from acids and other pool chemicals to avoid accidental reactions. Good storage helps me keep it effective for longer.

My Buying Checklist

Before I buy, I ask myself:

  • Do I need to raise my pool pH?
  • Is this product pure sodium carbonate?
  • Does the package give clear pool dosage instructions?
  • Is the size right for my pool?
  • Can I store it safely at home?

Final Thoughts From My Experience

In my experience, soda ash is a simple but important pool chemical when the water becomes too acidic. I always rely on testing, careful dosing, and proper storage to get the best results. If I choose the right product and use it correctly, it helps me keep my pool water balanced, clear, and more enjoyable to swim in.

Final Thoughts

I’ve found that soda ash can be a very effective way to raise the pH in a swimming pool when the water becomes too acidic. My main takeaway is that it should be used carefully and in the right amount, since overcorrecting can lead to new water balance problems. When I test the water regularly and make small adjustments, I can keep the pool more comfortable, clearer, and better protected overall.

Author Profile

Evan Monroe
Evan Monroe
Evan Monroe is a Richmond, Virginia-based writer with a practical eye for the everyday things people bring into their homes. Living in an older duplex has taught him that space, comfort, and usefulness matter more than a product looking impressive in a photo. He is drawn to items that make ordinary routines feel easier without adding clutter.

Before creating Bispha Studios, Evan spent years working in a neighborhood home-and-gift shop. Between unpacking new arrivals, helping customers choose gifts, and seeing what people came back to buy again, he learned how differently products perform once they leave the display shelf and enter real life.

Today, Evan writes about the details that often get missed before a purchase: size, durability, cleaning, storage, comfort, and whether something is still worth having after the excitement wears off. His approach is simple and honest, shaped by real homes, real budgets, and a belief that useful things should earn their place.