Best Calcium Swimming Pool Balancers of 2026

The Clorox Pool&Spa Calcium Hardness Increaser is a must-have for swimming pool owners who want to maintain the quality of their pool water. With this product, you can increase the low Total Hardness levels in your pool, which prevents corrosion, etching, staining, and pool surface damage. It is specially designed for plaster pools and soft water areas. Moreover, for best results, you can use it with the Clorox Pool app. The product is easy to use and comes with a manual that guides you through the process.

The SpaGuard Calcium Increaser is designed to help you maintain the right calcium levels in your spa water. By raising calcium hardness, it protects your equipment from damage caused by low calcium, such as corrosion. This means your spa’s metal parts stay safe and last longer. It also helps prevent the surface of your plaster spa from wearing down or developing rough spots, keeping it smooth and comfortable. Using this product ensures your spa water stays balanced, which can save you time and money on repairs while providing a better spa experience.

The MAV AquaDoc Calcium Booster helps you keep your hot tub water balanced and healthy by raising calcium hardness levels. This product prevents damage like corrosion, stains, and etching that can happen when water is too soft. It’s designed to increase calcium in your spa water in easy 10ppm steps, making it simple to maintain the right hardness. Having this booster on hand ensures you can quickly correct calcium levels and protect your hot tub’s surfaces and equipment. With MAV AquaDoc, balancing your hot tub water becomes more cost-effective and hassle-free, giving you peace of mind while enjoying your spa.

The Bio Ouster Hot Tub Kit offers everything you need to keep your spa water balanced and clear. It comes with easy-to-use products that help you quickly adjust the pH, alkalinity, and calcium levels, making the water more comfortable to soak in. This kit is designed to work with all types of hot tubs, including inflatable and acrylic models, so you can trust it no matter what you have. Plus, the included test strips let you check your water’s condition instantly, ensuring you maintain the perfect balance for a relaxing and safe spa experience.

The LEISURE TIME Calcium Booster is designed to improve your spa water by increasing its hardness level, which helps protect your equipment from damage caused by corrosion. By preventing foaming, it ensures a more enjoyable and relaxing spa experience without annoying bubbles. Keeping the water hardness balanced also helps extend the life of your spa, saving you money on repairs. This booster works well with common sanitizing systems like chlorine, bromine, ozone, and biguanide, so you can easily maintain clean and balanced water without worrying about compatibility issues.

The FROG Hardness Increaser is designed to help you easily raise and balance the calcium hardness in your hot tub or swim spa. This prevents damage like corrosion and staining, protecting your investment. Its special TruDose measuring cap makes dosing simple and spill-free, so you won’t have to worry about messy spills or guesswork. You can trust the clear indicators on the cap to measure the right amount every time, saving you time and effort. Plus, it works with any hot tub or swim spa size and all types of sanitizers, giving you flexible and reliable water care.

The SpaGuard Balancer Bundle is a comprehensive set of four products designed to keep your swimming pool water balanced and healthy. The bundle includes SpaGuard Alkalinity, pH Decreaser, pH Increaser, and Calcium Hardness Increaser. The Alkalinity product helps stabilize the pH level of your pool water, while the pH Decreaser lowers the pH level when it's too high. The pH Increaser, on the other hand, raises the pH level when it's too low, and the Calcium Hardness Increaser helps prevent damage to your pool's surfaces and equipment caused by low calcium levels. With all these products combined, you will have everything you need to maintain the perfect balance of your pool water, ensuring it's safe and comfortable for you and your family to swim in.

SpaChoice Calcium Booster is a 1-quart chemical used to increase calcium hardness in spas and hot tubs. In areas with low levels of hardness, the low hardness will etch plaster and corrode spa equipment. The ideal hardness level is 200-400 ppm (parts per million). By increasing calcium hardness, the SpaChoice Calcium Booster can prevent the damage caused by low hardness, extend the lifespan of your spa and hot tub, and save you money on repairs and replacements. The downloadable user guide is available under product information for technical specifications.

The EZ POOLS Muriatic Acid is a handy solution for keeping your pool water perfectly balanced. It helps you lower the pH to the ideal range, making your sanitizer work better and ensuring safe swimming conditions. This acid also reduces total alkalinity, which prevents your pool water from becoming cloudy or developing scale buildup, keeping it clear and inviting. Beyond balancing water, it’s great for deep cleaning, removing tough calcium deposits and stains from tiles and plaster surfaces. With a bulk pack of four gallons, you’ll have plenty on hand for regular maintenance or seasonal deep cleaning, making pool care easier and more efficient.