One cartridge should last for 400 liters, or around 105 gallons, and they vary in price from €40 ($47) to €50 ($58). The machine itself costs around $328, although it ships with one pod if ...

Mitte solves this problem by using mineral cartridges to replicate the process that occurs in nature when water flows through rocks, picking up minerals along the way. This unique process adds ...

The company offers three different mineral cartridges. Minerals can sometimes be filtered off in regular systems, these cartridges would add that back for maximum benefit.

And maintenance is minimal: the air filter needs replacing once a year, and the mineral cartridge every five years (for about $100).

This purification stage with water-saving technology features a super sediment filter, carbon block filter, RO membrane, mineral cartridge, ultrafiltration cartridge, copper 29 minerals cartridge ...