SilSpa Deluxe All Natural Spa Sanitizing Care Kit with Descaler and Defoamer No chlorine or bromine odor, SilSpa is silver based and is much gentler on your skin than traditional sanitizers. Silspa is compatible with all other spa chemicals, and is safe for all spa surfaces and equipment. SilSpa is comparable in cost to Bromine and Chlorine This natural spa sanitizing kit has been assembled by Oceantis, specifically for our customers who prefer a non bromine solution for safe, clean, sparkling water. This SilSpa startup kit will last you up to 6 months