--- 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: "R3662" currency: ZAR in_stock: true category: "In The Swim" url: https://www.desertcart.co.za/products/3575839-in-the-swim-alkalinity-increaser-for-swimming-pools-raises-alkalinity store_origin: ZA region: South Africa --- # Ensures crystal-clear water Prevents skin & eye irritation Stabilizes pH & alkalinity 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:** R3662 **Availability:** ✅ In Stock ## Summary > 💦 Keep your pool perfectly balanced — because your summer deserves flawless water! ## 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?** R3662 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/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 - • **Bulk 25-Pound Supply:** Long-lasting, granular formula designed for consistent pool maintenance without frequent repurchasing. - • **Precision pH Control:** Maintain perfect pool chemistry with 1.5 lbs per 10,000 gallons for a 10 ppm alkalinity boost. - • **Trusted by Thousands:** Rated 4.7 stars by over 2,400 pool pros and enthusiasts—join the community of perfectly balanced pools. - • **Optimized for Hot Summers:** Keeps your pool water refreshing and balanced even under intense heat, so your oasis stays inviting. - • **Ultimate Skin & Eye Comfort:** Prevents harsh pH swings that cause skin rashes and eye stinging—swim worry-free all summer. ## Overview In The Swim Alkalinity Increaser is a 25-pound granular sodium bicarbonate formula designed to raise and stabilize pool alkalinity between 90-120 ppm, preventing pH swings that cause skin irritation and eye discomfort. Trusted by thousands with a 4.7-star rating, it ensures crystal-clear, comfortable swimming water all season long. ## 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 ## 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 | #1,323 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #13 in Swimming Pool Balancers | | Brand Name | In The Swim | | Customer Reviews | 4.7 4.7 out of 5 stars (2,432) | | 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 | | Package Size Name | 25 Pound | | Product Benefits | Protects Against Skin Irritation | | UPC | 803354120857 | | Unit Count | 400 Ounce | ## Product Details - **Brand:** In The Swim - **Item Form:** Granular - **Item Weight:** 27 Pounds - **Product Benefits:** Protects Against Skin Irritation - **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) ## Available Options This product comes in different **Size** 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. ## Frequently Bought Together - In The Swim Alkalinity Increaser for Swimming Pools - Raises Alkalinity and Balances pH Levels in Your Swimming Pool Water - 100% Sodium Bicarbonate - 25 Pounds - In The Swim pH Increaser for Pools - Granular 100% Sodium Carbonate (Soda Ash) to Raise pH Up - 25 Pounds - In The Swim Calcium Hardness Increaser for Swimming Pools - Fast-Acting, Scale Prevention - 94% Calcium Chloride - 25 Pounds --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/3575839-in-the-swim-alkalinity-increaser-for-swimming-pools-raises-alkalinity](https://www.desertcart.co.za/products/3575839-in-the-swim-alkalinity-increaser-for-swimming-pools-raises-alkalinity) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-07-15*