- Non-staining formula prevents a wide variety of algae
- Powerful wetting agent and surfactant help it work into cracks and crevices
- Not appropriate for pools with attached spas or water features
- Can be used with the BioGuard 3-Step Care System
Save! When you purchase 4 or more quarts of BioGuard Back-Up 2 and/or BioGuard Algae All 60.