--- product_id: 192039415 title: "Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride" brand: "pool mate" price: "965.24 DT" currency: TND in_stock: true reviews_count: 8 category: "Pool Mate" url: https://www.desertcart.tn/products/192039415-pool-mate-25-pounds-premium-calcium-hardness-increaser-for-pools store_origin: TN region: Tunisia --- # Rapid hardness boost Precise ppm control Prevents corrosion & etching Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride **Brand:** pool mate **Price:** 965.24 DT **Availability:** ✅ In Stock ## Summary > 💧 Elevate your pool game with precision calcium control! ## Quick Answers - **What is this?** Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride by pool mate - **How much does it cost?** 965.24 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/192039415-pool-mate-25-pounds-premium-calcium-hardness-increaser-for-pools) ## Best For - pool mate enthusiasts ## Why This Product - Trusted pool mate brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted by Thousands:** Join 1,275+ happy pool pros who rate it 4.7 stars for reliable, season-long performance - • **Easy & Safe Application:** Dissolve in water and pour around the pool perimeter while circulating for hassle-free use - • **Tailored Hardness Range:** Maintain ideal calcium levels between 200-400 ppm for all pool types 📏 - • **Fast-Acting Calcium Power:** Boost your pool’s hardness by 10 ppm per 8 oz for crystal-clear water ⚡ - • **Ultimate Surface Protection:** Shield your pool from corrosion and unsightly etching with every dose 🛡️ ## Overview Pool Mate 25-Pounds Premium Calcium Hardness Increaser is a granular calcium chloride formula designed to rapidly raise and maintain optimal calcium hardness levels (200-400 ppm) in all pool types. It prevents corrosion and surface etching, ensuring long-lasting pool integrity. Easy to apply and trusted by thousands, it delivers precise dosing to keep your pool water balanced and pristine. ## Description This is a dry granular product that increases the total hardness in pool water to the recommended range.Test for calcium hardness with a reliable test kit. The desired range for calcium hardness is as follows: Vinyl Pools: 200-300 ppm, Tile and Exposed Aggregate Pools: 200-400 ppm, Marcite, Fiberglass or Painted Pools: 250-400 ppm. If the calcium hardness tests less than the desired range, add this product according to the included chart. Place this product into a plastic bucket already filled with swimming pool water. Do this in a ration of up to 2 pounds of product per approximate 5-gallon bucket of water. Slowly pour this solution around the perimeter of the swimming pool while the circulating system is operating. In a 10,000 gallon pool, do not add more than 10 pounds of this product per 2 hour period. Review: Works great for my swimming pool. - Good product at a very good price. Review: Calcium Hardness Increaser for Pools - Good stuff. Works well with my salt water pool and helps maintain the right chemical balance. Easy to use. Will be buying again next pool season! ## Features - Calcium chloride for pools - Rapidly increases total hardness - Helps prevent corrosion or etching of pools - Ideal calcium hardness range 200 - 400 ppm - 8 ounces raises calcium hardness level 10 ppm per 5,000 gallons of water - Prevents the staining or etching of your pool's surface - Low calcium hardness level can cause water issues ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07B7ZBCXQ | | Best Sellers Rank | #5,752 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #240 in Pool Cleaning Tools & Chemicals | | Brand Name | Pool Mate | | Customer Reviews | 4.7 4.7 out of 5 stars (1,275) | | Global Trade Identification Number | 00676215282588 | | Included Components | Pool Calcium Increaser | | Item Form | Granular | | Item Type Name | for Pools | | Item Weight | 25 Pounds | | Manufacturer | Pool Mate | | Product Benefits | Calcium Increaser | | UPC | 676215282588 034261216146 | | Unit Count | 400.0 Ounce | ## Product Details - **Brand:** Pool Mate - **Item Form:** Granular - **Item Weight:** 25 Pounds - **Product Benefits:** Calcium Increaser - **UPC:** 676215282588 034261216146 ## Images ![Pool Mate 25-Pounds Premium Calcium Hardness Increaser for Pools, 100% Calcium Chloride - Image 1](https://m.media-amazon.com/images/I/71FDXA6r7iL.jpg) ## Available Options This product comes in different **Size** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works great for my swimming pool. *by O***O on March 2, 2026* Good product at a very good price. ### ⭐⭐⭐⭐⭐ Calcium Hardness Increaser for Pools *by D***P on November 5, 2025* Good stuff. Works well with my salt water pool and helps maintain the right chemical balance. Easy to use. Will be buying again next pool season! ### ⭐⭐⭐⭐⭐ Works fast raising the Calcium hardness, easy to use and economically priced. *by F***I on July 28, 2025* This Pool Mate product raises the calcium hardness in pool water. It dissolves easily, rapidly raises the hardness and is very reasonably priced when purchased in the 25 pound size. ## Frequently Bought Together - Pool Mate 1-2825B Calcium Hardness Increaser for Pools, 25-Pounds - Pool Mate 1-2607B Pool Stabilizer for Pools, 7-Pounds - Clorox® Pool&Spa™ Swimming Pool pH Down, Lowers pH, Protects Against Eye and Skin Irritation, 5LB (Pack of 1) --- ## 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.tn/products/192039415-pool-mate-25-pounds-premium-calcium-hardness-increaser-for-pools](https://www.desertcart.tn/products/192039415-pool-mate-25-pounds-premium-calcium-hardness-increaser-for-pools) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-01*