The Hot Tub Serum-Cleaning Kit is a complete kit designed to give you everything you need for a drain, clean, and refill of your spa. The kit contains the 2oz Hot Tub Serum-Total Cleanse (used to purge the spa before draining) and the 16oz bottle of Hot Tub Serum-Total Maintenance (used to start up the fresh spa water in order to maintain maximum cleanliness) with a turbo-cleaning mitt that can be thoroughly clean the shell of the spa.