RO Filter- Matrikx CTO Carbon BlockMost common filter arrangements If your system utilizes one carbon block we recommend installing the 5 Micron CTO in the second stage after your sediment filter.* If your system utilizes two carbon blocks, we recommend installing the 5 micron CTO in the second stage after your sediment filter and the 1 micron CTO Plus in the third stage. Available in 10" and 20" *You may use a 1 micron CTO PLUS in a single block arrangement, however, depending on pre
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