BioGuard Strip Kwik is an effective degreaser that unclogs your sand, cartridge, and DE filter, restoring it to optimal efficiency. Its patented formula quickly cuts through the thickest oil, grease, dirt, and other contaminant buildups on your filter elements to significantly extend its lifespan, saving you money throughout the pool season. Strip Kwik cleans your filter in about an hour instead of overnight, soaking like its competitors. Best of all, this product is made right here in the USA to ensure the highest quality, allowing you to buy with confidence.