HTH Algae Guard Advanced Algae Control 1 Qt. (Pack of 6)

Powerful swimming pool treatment. It kills and prevents heavy growth of green, black, and mustard algae caused by low chlorine levels, poor water circulation, or very warm weather for a season of crystal clear pool water. Simply add the non-foaming, fast-acting algaecide directly to your swimming pool water and dive right back in. Compatible with all pool types and works great with HTH shock products. Online purchases are in packages of 6.