Flocculant
A pool flocculant is a coagulating agent that causes all suspended particles to clump and sink to the pool floor for vacuuming to waste.
In Plain Language
Unlike clarifiers (which coagulate particles for filter capture), flocculants (floc) cause rapid, heavy aggregation that drops particles to the pool bottom as a heavy sediment. After adding floc and allowing particles to settle (typically 8–12 hours with the pump off), the settled debris is vacuumed to waste — bypassing the filter entirely. Floc produces faster, more dramatic clarity improvement than clarifier but requires the ability to vacuum to waste.
Why It Matters
Flocculant is the fastest way to clear severely cloudy water but requires follow-up vacuuming and cannot be used if the pool cannot be vacuumed to waste.
Typical Values
Last reviewed: 2026-06-01