Used Nikken Aqua Pour water system filters and softens water, adds minerals, makes water more alkaline PH balance. Aqua Pour meets NSF/ANSI 42 standards for chlorine reduction as verified and substantiated by test data. Includes 2 brand new unused gravity filter cartridges (costs $38.00 each), 2 brand new unused micro sponge pre-filters (costs $15.00 each), 2 brand new unused sets of mineral stones (costs $45.00 each) and manual. See photos for more information on lifetime of filter cartridge, pre-filter & mineral stones. We have a whole house water filtration system so no longer need the Aqua Pour.