FROG Soothe Calcium Total Hardness Increaser for Hot Tubs & Swim Spas – 2 lb with TruDose Cap

Effortless hardness balancing for your spa water

Meet FROG Soothe Calcium Total Hardness Increaser, a fast-dissolving solution designed to raise and stabilize total hardness in hot tubs and swim spas. By maintaining an appropriate hardness level, you can help protect surfaces and equipment from wear and mineral-related staining, while supporting the look and feel of your water.

Designed with user convenience in mind, this formula features the TruDose measuring system. The cap seals securely to prevent spills, and the bottle includes standard cup and tablespoon indicators. The translucent cap makes dosing straightforward, so you can add the right amount with confidence—no arithmetic needed.

Compatibility is the key. FROG Soothe works with hot tubs and swim spas of any size and accepts any sanitizing chemistry—chlorine, bromine, or salt. The included dosage guide covers both hot tubs and swim spas, making it easy to follow along with your specific setup.

For ongoing water care, FROG brings more than 25 years of experience to your routine. The brand's patented Mineral Technology and prefilled cartridges help create water that reads cleaner, feels softer, and leaves surfaces looking clear. These elements are designed to complement existing sanitation and maintenance regimes.

Real-life use scenarios include after refilling a spa, during seasonal balance shifts, or when water is reused after maintenance. This product helps maintain a protective hardness level, contributing to a stable, balanced spa environment. While results can vary, many users find the routine easier and the water feel more consistent when used as part of regular maintenance.

How to use

1. Check your spa water reading with a standard test strip. 2. Open the TruDose cap and pour the recommended amount. 3. Reseal and rinse if needed. 4. Re-test and adjust as advised by the dosage guide.

Fast, effective benefits

• Raises total hardness quickly to protect equipment
• Reduces the risk of surface staining from mineral scaling
• Supports stable water balance without guesswork

Why choose FROG Soothe

• Easy dosing with measuring cap and clear instructions
• Fully compatible with chlorine, bromine, and salt systems
• Backed by decades of water care experience and Mineral Technology