Water Modulating Filter Cartridges (Pack of 4)
Makes aqueous ozone solution 15% more potent when used with Aqueous Ozone Spray Device. Because tap water around the country can be quite different, this water modulating filter cartridge ensure that the ozone solution generated is of a proper quality, even if your water is on the hard/soft/acidic/alkaline side.
A box of replacements cartridges comes with 4 cartridges, the equivalent of about 30 liters of sanitizing solution, and the whole box is the size of your palm. At $29.95, that's about $1 per liter. It's affordable, space saving, convenient, ensures quality and gives you the security of being "fully stocked".
Rest assured - each cartridge is capable of making roughly 7.5 liters of solution, so it won't need to frequent changes. An simple indicator on the cartridge tells you when - when the window has turned completely red, it's time. Switching the cartridge takes about 10 seconds, and you're on your way.