Save money with this refillable filter. SPECIAL MIX OF BIRM, CATALYTIC CARBON, AND KDF85. This is an excellent choice if you are looking for a filter that will remove a wide range of contaminants. Application: This system should be employed where low to moderate ferrous (dissolved) iron or hydrogen sulfide contamination is known or expected (hydrogen sulfide produces a distinct rotten egg / sulfur odor).
eBay