FROG DropH pH & Total Alkalinity Decreaser for Hot Tubs & Swim Spas — 3 lb with TruDose Cap

Effortless water balance for your hot tub

FROG DropH pH and Total Alkalinity Decreaser is designed to quickly lower pH and total alkalinity in hot tubs and swim spas. The result can be clearer water, a more comfortable soak, and improved sanitizer performance. The 3 lb bottle includes a TruDose measuring cap that seals the bottle to prevent spills, while its translucent cap shows you precisely where you stand as you dose.

Smart dosing where it matters

Real-life use cases include after heavy use, seasonal changes, or when you notice water looks hazy or feels off. DropH works with all sanitizing systems, including chlorine, bromine, and salt, and targets a pH range around 7.2 to 7.8 for a balanced feel. This helps skin and eyes feel less irritated and can support better sanitizer effectiveness, though results can vary by spa and usage.

• Fast dissolving formula that blends quickly for faster results.
• TruDose cap seals the bottle and features standard cup and tablespoon indicators for easy dosing.
• Clear instructions and compatibility with a wide range of sanitizer systems.
• Fits hot tubs and swim spas of any size and with any spa chemistry.
• FROG has more than 25 years of water care experience and uses its Mineral Technology for clearer water.

How to use

Follow the dosage guide for hot tubs or swim spas. Use a test strip to confirm the reading before and after dosing. No math is needed—use the cap marks and the guide to dose accurately.

• Test the water before dosing, then apply the recommended amount for your spa size.
• Re-test and adjust if needed to keep the water in the target range.

Why choose FROG DropH

With more than two decades in water care, FROG delivers dependable products and a focus on clearer, softer water. DropH combines proven technology with practical design to simplify maintenance and help you keep your water inviting for soaking and relaxation.