COMPATIBILITY WARNING: NOT compatible with salt water systems, salt generators, or IQ smart monitoring systems COMPATIBLE SYSTEMS: Works with traditional hot tub water maintenance only; Do not use with any salt-based water treatment or smart monitoring systems 12-Month Complete Supply: One mineral stick lasts 4 months; 3 sticks provide full year of continuous spa water treatment Effortless Installation: Simply drop silver ion cartridge into filter standpipe - seamless addition to existing maintenance routine 365-Day Pristine Water Quality: Simplifies hot tub maintenance for effortless year-round spa enjoyment with less work Cost-Efficient Water Treatment: Reduces daily chemical expenses and saves time with 50% less maintenance requirements Enhanced Water Experience: See, smell, and feel the difference - crystal clean water with reduced chemical dependency Advanced Mineral Ion Technology: Controlled release technique remains effective in any temperature or usage conditions 600-Gallon Capacity Coverage: Works continuously 24/7 for spas up to 600 gallons without frequent replacements Universal Traditional Spa Compatibility: Fits most standard spas with 1-1/4" filter hole and 6.5"-16" length for effortless installation This product is designed EXCLUSIVELY for hot tubs and spas using Traditional water treatment systems. NOT compatible with: Salt water systems or salt generators, IQ smart monitoring systems, Salt-based water treatment of any kind. PRODUCT OVERVIEW: Premium 3-pack mineral silver ion cartridge sticks providing 12-month crystal-clear water treatment for traditional spas. Advanced controlled-release technology delivers 1.05% silver ions for enhanced water quality with 50% reduced maintenance. KEY BENEFITS: Reduces chemical usage by up to 50%; Maintains clean and clear water; Enhanced with vitamin C and E for superior water quality; Crystal-clear, odor-free water experience; Significant cost savings on spa chemicals SPECIFICATIONS: Universal fit for standard hot tubs and spas up to 600 gallons; Each stick lasts 4 months (12-month total supply); Simple drop-in installation in filter standpipe; Controlled 1.05% silver ion release technology; Works alongside traditional shock treatments. INSTALLATION: Simply drop one cartridge into your spa’s filter standpipe; Replace every 4 months for continuous protection; Compatible with all major spa brands and systems. IMPORTANT COMPATIBILITY NOTICE: Compatible with standard hot tubs only. Not compatible with salt systems or IQ monitoring systems.Please verify your hot tub type before choosing our product.