1. Remove cartridge filter elements.
2. With spa water temperature 35⁰C(95⁰F) or higher, add entire contents of Spa Purge bottle to spa water.
3. Run jets a minimum of 5 minutes. Note: If excessive foaming occurs, turn jets off.)
4. Maintain water temperature and allow spa to circulate overnight with jets off.
5. Drain, rinse and then refill spa and reinstall filter elements. Proceed with normal spa maintenance.