2"x4" cartridges are supplied with 1/4" coupler to connect on the underside of the upper chamber onto the nozzle of the ceramic element(s). You'll need same amount of specialty elements as you have ceramics in the upper chamber.

Brimac® BC-830 media. These filter elements are designed to reduce heavy metals, fluoride, color, bromine, pesticides, and chlorine/chloramine in drinking water. They are constructed with materials which are FDA approved.

The particle size used to accommodate filtration reductions of the following contaminants is 8x30 mesh. Metals adsorbed: Lead, Aluminum, Cadmium, Copper, Zinc, Iron, Manganese, Silver, Arsenic, Nickel, Mercury and Chromium. The rate of adsorption is determined by contact time between the incoming water and time in the cartridge.

Adsorption will vary dependent upon the contaminants aimed for removal. Some contaminants will be more easily filtered with low pH range, whilst others will be more effective at a higher level. Percentage of reductions will vary from 50% to 95% over the life of the filter element based on the level of contaminant (s) found in your water supply.