4-stage combination reverse osmosis and de-ionization unitsRemoves nearly all tap water contaminants to make it 99.9 percent pureEssential first step in maintaining excellent aquarium water qualityIdeal for reef aquariums and all systems that require pristine source waterThe 4-stage Maxxima RO/DI takes the full size RO to a higher level of filtration. The Maxxima is an excellent selection for reef enthusiasts and other serious aquarists, especially those who live in areas with exceptionally high levels of phosphates in their tap water. Includes: TFC (Thin Film Composite) membrane, carbon and sediment pre-filters, mixed-bed deionizing post-filter, with clear canister housings. The post deionizer takes the small percentage of contaminants that the membrane could not remove and filters this to greater than 99.9 percent pure. Replacement Mixed Bed Resin Cartridge available.Note: Chlorine will ruin TFC, Hi-F, and Hi-S membranes so prior carbon filtration is required.andnbsp;Hi-S Percentageandnbsp;andnbsp;Hi-S PercentageAluminum96 - 98andnbsp;Lead95 - 98Ammonium80 - 90andnbsp;Mercury94 - 98Bromide90 - 95andnbsp;Nickel96 - 98Cadmium93 - 97andnbsp;Nitrate96 - 98Chromium95 - 97andnbsp;Phosphate95 - 98Copper96 - 98andnbsp;Silicate92 - 95Hardness93 - 97andnbsp;Sulfate96 - 98Iron96 - 98andnbsp;Zinc96 - 98Please click on "More Information" for instructions for installation, operation, maintenance, and troubleshooting.

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