This .1 Micron Granulated Activated Carbon filter. Fits all AlkaBlue older Jupiter models and Nexus water ionizers. It is made of the highest quality, NSF certified filter media and is designed to be a superior filter for city water.
Note: If ever the AlkaBlue .1M Biostone Carbon filter is not available, they are interchangeable (and are identical, other than the label) with the Nexus .1M Biostone Carbon filters. Orders will be fullfilled with the .1M Nexus Biostone Filters.
(Rated for 1000 gals)