Technical Pool Solutions Professional Sand Filter Cleaner Removes contamination for better filtration This is the most heavily engineered and effective sand cleaner on the market Reduced chemical consumption, and cleaner, clearer pool water with less need to us pool shock treatments Safer, healthier pool water. The pool filter harbors the most bacteria and other contaminants in the pool. A clean filter will provide safer pool water decreasing the risk of recreational water illnesses. No need to change sand, just clean it; after using this product your sand will be cleaner than it was when it was new. We don't believe sand ages in pool filters. It becomes full of oils, contaminants, biofilm and scale. This filter cleaner will eliminate channeling in pool filters.