Custom-Designed for Jacuzzi Frog @ease refills for Jacuzzi give you a whole season (12+ weeks) of easy, low-chlorine sanitizing when used along with the Frog @ease Sanitizing System for Jacuzzi Hot tubs. This is the 3 pack smartchlor replacements for the Frog @ease System specifically designed for Jacuzzi tubs equipped with the Frog Sanitizing System