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Good Option - BioStone Basic Filter
Used in single filter ionizers or in Filter Position 2 in dual-filter ionizers. It utilizes compressed carbon block technology, offering you more surface area and performance. Unlike GAC, it will help reduce Chloramine. The Basic offers you Scale Guard to protect your ionizer from hard water and will out perform any GAC filter regardless of micron rating. (Rated for 1000 gals.)
