Laica Bi-Flux Water Filter Cartridge with MineralBalance - Single Pack BI-FLUX MineralBalance Filter. Exclusive MineralBalance Formula Helps to Preserve the Balance of CALCIUM and MAGNESIUM that is Naturally Present in Tap Water TESTED: The Mineral Balancing Properties of the Biflux Pitcher Cartridge have been independently tested by the Water Quality Association (WQA) pH Balanced Formula: Bi-Flux Technology Maintains the Right pH Level in the Water (6.5 to 9.5) Effectively Filters: Chlorine, Thrialomethanes, Heavy Metals, Chlorinated Hericides and Pesticides Made in ITALY