This kit contains all the essentials for hot tub start up and maintenance, and is perfect for any hot tub owner looking for a gentler alternative to traditional chlorine sanitation. Reserve and Renew uses a combination of bromide salts and chlorine free shock oxidizer to eliminate bacteria from your hot tub water and keep it sparkling clean. The products in that kit come in smaller sizes so you can discover which treatments work best for you before purchasing the full sized products. All products and their uses can be explained by the included DVD.