Flock, also known as pool flocking agent or flocculant, is a chemical product used in swimming pool maintenance to help clear cloudy or hazy water by settling suspended particles to the bottom of the pool for easier removal.
When pool water becomes cloudy or hazy, it is often due to the presence of small particles such as dirt, debris, dead algae, or other organic matter that are too small to be captured by the pool filtration system. These particles can remain suspended in the water, causing the pool to appear dull or murky.
Flock works by binding these small particles together, forming larger clumps or "flocs" that sink to the bottom of the pool. Once the particles have settled, they can be easily vacuumed or manually removed from the pool.