Sirona® Defend

Protect your pool proactively with Sirona® Defend, an advanced algaecide and water enhancer designed to keep water crystal clear and free from algae outbreaks. Featuring a patented polymer shield formula, Defend creates an invisible protective barrier on pool surfaces to prevent green, yellow, and black algae from taking hold—before they become a problem.

This multi-action treatment not only inhibits algae growth but also enhances water clarity by binding microscopic particles to improve filtration performance. By maintaining sanitizer efficiency, Sirona® Defend reduces chemical fluctuations, helps prevent scale and staining, and ensures cleaner, healthier water throughout the season.

Designed for compatibility, Defend is safe for all pool types—including vinyl, plaster, fiberglass, and tile—and works alongside chlorine, bromine, salt, mineral, or ozone systems. Its non-foaming, surface-safe formula is easy to apply: simply broadcast the recommended dose into the deep end while your pump is running. Use on a weekly basis or after heavy rain, renovation, or periods of disuse for reliable protection.

Ideal for homeowners, service providers, and property managers, Sirona® Defend simplifies pool care and minimizes maintenance workload. Enjoy consistently bright, inviting water with fewer chemicals and lower risk of algae issues.

Routine use of Sirona® Defend helps maintain oxidation balance, improves filter efficiency, and supports an all-in-one strategy for healthier, hassle-free pool water care.