Fresh Mineral Water with SmartChlor™ Technology in one floating system!  Blue 
Mineral Cartridge and Silver SmartChlor™ Cartridge snap together and float in the hot tub. 
 
The unique SmartChlor™ Technology slowly releases over 3-4 weeks. When the 
system flips over it is time to replace. 3 replacements per package. For use in any hot tub up to 600 gallons. 
 
- Up to 75% Less Chlorine Usage
 
- Only Shock Once a Month
 
- SmartChlor™ Self Regulates for Continuous Clear Water
 
The SmartChlor™ Difference:With SmartChlor™ Technology, there is always a reserve of chlorine waiting to be used. When needed the reserve automatically converts to free chlorine which maintains a consistently low level.
Dichlor tabs tend to have yo-yo chlorination while SmartChlor™ Technology keeps the free chlorine in the 0.5 to 1.0 range at all times. 
 
 
Contains 3 Silver Ball cartridges.