Knockdown High Performance Flocculant Returning an empty bottle?:Yes Effective across wide pH levels

Effective across wide pH levels

and odorless

UV-resistant plastic with locking twist cap

It’s a small step that adds up — for your pool

Small but mighty for stubborn algae spots

Knockdown High Performance Flocculant Returning an empty bottle?:Yes Effective across wide pH levelsDrop unfilterable debris for clear water. Fast. When clouds of debris make your pool look less than perfect, Knockdown delivers. This high performance, non alum flocculant binds fine particles into heavy clumps that sink to the bottom so you can easily vacuum them away. Unlike clarifiers that slowly burden your filter, Knockdown works fast with the pump off, restoring crystal clarity overnight. Its effective over a wide pH range, safe for all