DescriptionUse Power Soak when you need a fast-acting, heavy-duty granular filter cleaner for hot tub spa & pool pleated cartridges. Power Soak Filter Cleaner is the formula recommended by major manufacturers and preferred by professionals. It releases its power when mixed with hot or cold water. Removes lotion residues, body oils, dirt & grime. Improved double-strength formula now also contains enzymes for added cleaning power to devour organic contaminants. Double-concentrated Very economical: enough for at least 4 filter cleanings Non-foaming formula 1 lb. bottle Product notes: Use just 1/2 cup in a 5-gallon bucket of water. Clean hot tub filters with every water change, at least every 3-4 months.