The Vision Sanitizing System has no moving parts and requires no electrical connections. It contains a powerful, Silver (Ag) catalyst bed with a large surface area. Water circulates through the Vision Sanitizing System, then through the spa filters, then through the heater housing and returned to the bathing area. When used with a combination of a Water Management System and a Chlorine base, Vision provides a soft, residual bactericide that compliments the natural oxidizing power of ozone and the sanitizing power of Chlorine