Hydro-logic Merlin GP Green Carbon Filter

The Carbon Filter is the carbon block pre-filter that will remove sediment, chlorine, organic chemicals, etc. The Sediment Filter is a pre-filter that will remove silt, rust, sand, etc. The Merlin Garden Pro comes with two RO membranes elements. When it is time to replace them, both must be replaced simultaneously. 1,500 gallons of RO water filter life.