QTY: 1 FROG @EASE FLOATING SYSTEM FOR HOT TUBS QTY: 1 FROG @EASE REPLACEMENT SMARTCHLOR 3 PACK QTY: 1 FROG MAINTAIN Annual – Pay upfront and receive regular shipments every 4 months of the essentials. It’s easy, convenient, and stress free Every 4 months – Your card will be charged every 4 months when your essentials ship.