Pool professionals demand a fast, powerful flocculant when working on tough cloudy pools. Lo-Chlor’s Knockdown, a non-alum flocculant, includes a clarifier solution to save time and effort. Knockdown drops a wide range of debris to the pool bottom where it can be easily and quickly vacuumed out. It also includes a polishing clarifier to finish the job and it won’t affect water balance. It begins working immediately and finishes the job quickly. Knockdown typically delivers high clarity overnight.