Keep your swim spa water clean, clear, and easy to maintain with the FROG® @ease® SmartChlor® Cartridge. Designed for use with the FROG @ease Sanitizing System for Swim Spas, this replacement cartridge works with FROG minerals to reduce chlorine use by up to 75%, maintain consistent water quality, and provide weeks of hassle-free protection. Simply replace the cartridge every 3–4 weeks and enjoy softer water with less maintenance.