Ozone with MPS and Silver Ions is slightly more expensive than traditional water care. It is still a fairly manual process, but requires a little less interaction from the spa owner than manually adding chlorine or bromine. Spa owners enjoy this system because it only requires a very small amount of chlorine and chemicals.
Ozone systems were once considered the best water care option for hot tubs, and has since become the industry standard for hot tub water care in most middle tier hot tubs. Ozone water care systems use powerful oxidizers – ozone and MPS – with silver ions to decrease the need for chlorine. Once the Ozone unit is installed, it continually releases tiny ozone bubbles into the spa water. The silver ion cartridge then automatically releases silver ions into the water that inhibit the growth of bacteria. The spa owner then has to manually add MPS to the spa with each use, and a small amount of chlorine once a week. The silver ion cartridge should be replaced every three months, and the ozone unit will need to be replaced every 4-5 years.