Reduce water hardness by reducing calcium and magnesium ion content in water.
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Aquafilter AISTRO-L-CL in-line water softening cartridge 2,5″ x 12″
Aquafilter FCCST 10BB Water softening cartridge 10″ Big Blue
Aquafilter FCCST 20BB Water Softening Cartridge 20″ Big Blue
Aquafilter FCCST Water softening cartridge 10″
Aquafilter FCCST2 Water softening and iron removal cartridge 10″