Flocculant
Flocculant is a chemical that is commonly used in swimming pools to combine small particles that are unfilterable. By using a floc to combine these particles, you make them large enough to be filtered or vacuumed out of the pool water. Floc is great in a situation where your chemical balance levels are good but clarity is poor. Floc is avilable in granular or liquid form and from top brands like Blue Horizons and Happy Hot Tubs.
