---
product_id: 3575839
title: "In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 25 Pounds"
brand: "in the swim"
price: "5366991₫"
currency: VND
in_stock: true
reviews_count: 8
category: "In The Swim"
url: https://www.desertcart.vn/products/3575839-in-the-swim-alkalinity-increaser-for-swimming-pools-raises-alkalinity
store_origin: VN
region: Vietnam
---

# 100% Sodium Bicarbonate 25 Pounds Balances pH Levels In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 25 Pounds

**Brand:** in the swim
**Price:** 5366991₫
**Availability:** ✅ In Stock

## Summary

> 💦 Dive into Perfection!

## Quick Answers

- **What is this?** In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 25 Pounds by in the swim
- **How much does it cost?** 5366991₫ with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/3575839-in-the-swim-alkalinity-increaser-for-swimming-pools-raises-alkalinity)

## Best For

- in the swim enthusiasts

## Why This Product

- Trusted in the swim brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **📊 Easy Dosage:** Just 1.5 lbs per 10,000 gallons for a perfect boost.
- • **🌡️ Summer Ready:** Keep your pool refreshing all season long.
- • **🔒 Stable Chemistry:** Prevent pH swings for worry-free swimming.
- • **📏 Precision Alkalinity:** Maintain optimal levels at 90-120 ppm.
- • **🏊‍♂️ Crystal Clear Waters:** Say goodbye to skin rashes and eye stings!

## Overview

In The Swim Alkalinity Increaser is a premium 100% Sodium Bicarbonate product designed to raise alkalinity and balance pH levels in your swimming pool water. Weighing 25 pounds, it ensures stable water chemistry, preventing skin irritations and eye discomfort while keeping your pool refreshing during hot summer days.

## Description

desertcart.com : In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 25 Pounds : Swimming Pool Ph Balancers : Patio, Lawn & Garden

Review: 100 pure sodium bicarbonate - same as at the pool store, but for a lower price - This alkalinity increaser is 100 percent sodium bicarbonate, the exact same chemical used in other alkalinity increasers (it is baking soda). As with many other chemicals required for pool maintenance, desertcart has a significant discount over those found at your local pool supply store. This product is about 12-13 percent less, from what I have observed. This product is packaged with an internal bag that is closed with a plastic clip (looks exactly like an oversized clip used on bread bags). This makes it a little difficult to pour out as the bag tends to slip out of the bucket. If you are not careful you could end up with the entire bag in your pool. Once about half of the bag is used, I've found it easier to simply empty the bag into the bucket and discard the bag. The bag tends to slide out more when there is less product left in it and when it's full it's too difficult to lift out of the bucket to invert it to pour it out. There is a dosage chart on the back. The chart goes up to a 50,000-gallon pool size. This is nice, as most charts on pool chemicals stop at a lower size. I have a larger pool so with this chart I can directly read the dosage, saving an extra math step (and a potential source of error). As with all alkalinity increaser, this will slightly raise your pH level. And adding acid to lower the pH can lower the alkalinity, so it can take a little back and forth to get both balanced. My best advice for this is, first, test your pool often and try not to let the levels drift too far outside of the desired range. The further they are out of range, the more difficult it is to get them back. Second, add only one chemical at a time (alkalinity increaser or acid) and leave at least 24 hours between adding them. It can be tempting to add a little extra alkalinity increaser since you will probably have to add acid to lower the pH afterwards, but it is not recommended to do this unless you know exactly what you are doing (if you get the alkalinity too high, you will have to try to lower it). Best to add a little less than needed, wait 24 hours, retest, and add more if needed. Works just as any other alkalinity increaser. The staff at the local pool store recommends pouring the required amount (see the back for dosage recommendations) in one location (i.e., do not "broadcast" it or spread it around the perimeter of the pool). They claim this is the best way to increase the alkalinity without increasing the pH. When adding acid, they told me to do the opposite, broadcast it around the perimeter spreading it out as much as possible. They claim this is the best way to lower the pH without also lowering the alkalinity. I'm not sure about the validity of this since I am not a chemist. However, I do know the workers at the pool store are also not chemists so I am more than mildly suspicious this is either an old wives' tale or anecdotal at best.
Review: Good product - Great price and does the job.

## Features

- In Swim Alkalinity Increaser maintains pH and chlorine levels.
- Prevents pH swings, maintaining stable water chemistry.
- High pH causes skin rashes; low pH stings eyes.
- Ensures refreshing pool water, even in hot summers.
- Maintain alkalinity at 90-120 ppm. Add 1.5 lbs per 10,000 gallons to increase by 10 ppm.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002WKF9CA |
| Best Sellers Rank | #2,225 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #12 in Swimming Pool Balancers |
| Brand | In The Swim |
| Brand Name | In The Swim |
| Customer Reviews | 4.7 out of 5 stars 2,407 Reviews |
| Item Form | Granular |
| Item Weight | 27 Pounds |
| Manufacturer | In The Swim Discount Pool Supplies |
| Manufacturer Part Number | Y7320 |
| Model Number | Y7320 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Product Benefits | Protects Against Skin Irritation |
| UPC | 803354120857 |
| Unit Count | 400 Ounce |

## Product Details

- **Brand:** In The Swim
- **Item Weight:** 27 Pounds
- **Item Form:** Granular
- **Product Benefits:** Alkalinity Increaser
- **UPC:** 803354120857

## Images

![In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 25 Pounds - Image 1](https://m.media-amazon.com/images/I/61NjiiAXtQL.jpg)
![In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 25 Pounds - Image 2](https://m.media-amazon.com/images/I/81lpQkA2AIL.jpg)
![In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 25 Pounds - Image 3](https://m.media-amazon.com/images/I/81RztbpF94L.jpg)
![In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 25 Pounds - Image 4](https://m.media-amazon.com/images/I/913qKToUBfL.jpg)
![In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 25 Pounds - Image 5](https://m.media-amazon.com/images/I/61DsSL2uTsL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: how many tablets in a 50 lb pail?**
A: This product is not a tablet... it is a powder. It is 100% sodium bicarbonate (same thing as baking soda).  If you want to raise the alkalinity in your pool you can do it by using baking soda which is much cheaper.  A 4 lb. box at Walmart costs about $2.25.

**Q: What is the chemical difference between "in the swim" alkalinity up and "in the swim" pH increaser?  Big price difference.**
A: alkalinity up is sodium bicarbonate, mainly increases alkalinity and some pH.  Important for concrete pools.  pH increases is sodium carbonate, a stronger base.  Raises pH with little increase in alkalinityy.

**Q: How much soda ash should I use**
A: This product is not soda ash.  It is sodium bicarbonate, commonly known as baking soda.  To increase alkalinity 10 ppm in a 20,000 gallon pool, you would add approximately 3 lbs. of alkalinity increaser or baking soda. (Adjust according to your pool size).  Simple baking soda is the same product as alkalinity increaser and can actually be purchased much cheaper (about $2.25 for a 4 lb. box at Walmart).  Soda ash will increase both alkalinity and pH.

**Q: Can in the pool alkalinity increaser replace spaguard?**
A: Alkalinity increaser is the same product no matter what brand you buy.  For an even cheaper solution, just buy regular baking soda (large boxes) at Walmart or Amazon.  Compare the labels on alkalinity increaser from the pool store and on regular baking soda..... they are the same..... sodium bicarbonate.  I have owned a pool for years and I only use baking soda to increase alkalinity in my pool water when needed.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 100 pure sodium bicarbonate - same as at the pool store, but for a lower price
*by L***S on January 14, 2016*

This alkalinity increaser is 100 percent sodium bicarbonate, the exact same chemical used in other alkalinity increasers (it is baking soda). As with many other chemicals required for pool maintenance, Amazon has a significant discount over those found at your local pool supply store. This product is about 12-13 percent less, from what I have observed. This product is packaged with an internal bag that is closed with a plastic clip (looks exactly like an oversized clip used on bread bags). This makes it a little difficult to pour out as the bag tends to slip out of the bucket. If you are not careful you could end up with the entire bag in your pool. Once about half of the bag is used, I've found it easier to simply empty the bag into the bucket and discard the bag. The bag tends to slide out more when there is less product left in it and when it's full it's too difficult to lift out of the bucket to invert it to pour it out. There is a dosage chart on the back. The chart goes up to a 50,000-gallon pool size. This is nice, as most charts on pool chemicals stop at a lower size. I have a larger pool so with this chart I can directly read the dosage, saving an extra math step (and a potential source of error). As with all alkalinity increaser, this will slightly raise your pH level. And adding acid to lower the pH can lower the alkalinity, so it can take a little back and forth to get both balanced. My best advice for this is, first, test your pool often and try not to let the levels drift too far outside of the desired range. The further they are out of range, the more difficult it is to get them back. Second, add only one chemical at a time (alkalinity increaser or acid) and leave at least 24 hours between adding them. It can be tempting to add a little extra alkalinity increaser since you will probably have to add acid to lower the pH afterwards, but it is not recommended to do this unless you know exactly what you are doing (if you get the alkalinity too high, you will have to try to lower it). Best to add a little less than needed, wait 24 hours, retest, and add more if needed. Works just as any other alkalinity increaser. The staff at the local pool store recommends pouring the required amount (see the back for dosage recommendations) in one location (i.e., do not "broadcast" it or spread it around the perimeter of the pool). They claim this is the best way to increase the alkalinity without increasing the pH. When adding acid, they told me to do the opposite, broadcast it around the perimeter spreading it out as much as possible. They claim this is the best way to lower the pH without also lowering the alkalinity. I'm not sure about the validity of this since I am not a chemist. However, I do know the workers at the pool store are also not chemists so I am more than mildly suspicious this is either an old wives' tale or anecdotal at best.

### ⭐⭐⭐⭐⭐ Good product
*by K***N on August 10, 2025*

Great price and does the job.

### ⭐⭐⭐⭐⭐ Value for money
*by W***N on October 26, 2025*

Good product

## Frequently Bought Together

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-05-18*