ecoOne Spa Monthly is a blend of organic compounds, such as coconut extract that naturally attract contaminants that sanifizers would be busy killing such as body oils, dirt, and lotions in the hot tub water. As it breaks down, it’s released and gradually coats the filter cartridge which improves spa filtration and makes cleaning the spa filter MUCH easier. Coconut has the added benefit of softening the skin and conditioning the water. This natural clarifier agent will keep a 500 gallon hot tub crystal clear for one full month. Directions: Pour directly into spa water, that’s it!