I modified my filter to a 6 stage system where the minerals lost by the RO membrane filter are replaced by the additional stage.
5 Stage Reverse Osmosis (RO) system is one of the best under-counter solutions you can implement in your home or office to ensure safe, pure, and great tasting water.
The multi-stage filtration technology eliminates 99.8% of harmful contaminants in water such as bacteria, viruses, lead, radium, chlorine, and arsenic, and it also removes 99.8% of all minerals from water. Low mineral content water is a great option for detoxifying your body as well as helping to prevent and dissolve kidney stones, but our optional Mineral Injector cartridge can be added to the system to insert traces of potassium, calcium, magnesium, germanium and iron back into the water if required (purchased separately).
The 5 stages of the RO water filtration included in this system:
1st Stage: 10 inch Standard Melted Spray Sediment filter
2nd Stage: 10 inch Standard Granular Activated Carbon filter (GAC)
3rd Stage: 10 inch Standard Activated Carbon Block filter
4th Stage: Reverse Osmosis membrane: 50 GPD (Gallons per day)
5th Stage: ST33 Inline Color, Taste and Odour filter (CTO Filter)
(Optional 6th Stage: Mineral injector - purchased separately)