BIOGUARD BACK UP 2 ALGICIDE 1QT
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
The addition of algicide is needed for proper pool maintenance. Sanitizers or shock/oxidizers alone may not keep algae at bay and this step is needed to keep your pool completely clear of any growth. One of BioGuard's most popular algae preventatives. Works well in chlorinated and brominated pools. A powerful surfactant/wetting agent makes Back Up able to work in tiny cracks and crevices where algae start.