Swimming Pool Calcium Hardness Increaser - Fast-Acting Scale Prevention - 94% Calcium Chloride - 25 Pounds

Founded in 1982 by a husband and wife team, In The Swim started small, shipping chlorine from their garage and taking orders on their front porch. However, they quickly began to envision the potential for something much bigger. Now, 40 years later, In The Swim is one of the largest online retailers for pool chemicals, supplies, and equipment in the country.

Their products include everything from opening kits and solar covers to hard wall pools and liners. They offer a wide range of chemicals, including chlorine, shock, salt cells, algaecides, and more. The store also provides accessories like spa kits, covers, and safety equipment. There are various products for pool maintenance, such as water clarifiers and alternative sanitizers, as well as items for specific issues like stain removers and deck paint.

One of their products, the In The Swim Pool Calcium Hardness Increaser, is designed to prevent low hardness levels that can lead to aggressive water behavior and potential water damage. With 97% granular calcium chloride, it can effectively raise calcium levels to the ideal range of 200 - 400 ppm. They advise using 6 lbs. per 10,000 gallons to raise levels by approximately 50 ppm, and caution against premixing it with small amounts of water due to a chemical reaction generating heat.

In addition to their products, In The Swim provides guidance on pool care, including the signs of low calcium hardness, the importance of adjusting and balancing pool water, and the use of sanitizers to maintain a clean and healthy pool. They also offer customer reviews and detailed information about their water sanitizers, such as 3-inch chlorine tablets, Cal-Hypo pool shock, and bromine tablets. These products contain various main ingredients and are suitable for different applications, with different features and recommended usage.

Overall, In The Swim offers a comprehensive range of pool products and resources to help pool owners maintain and enjoy their pools, from chemicals and supplies to expert advice on pool care.

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