indicated by a blinking 'x10" image

✔ NSF certified 10

During this operation the second or third cartridge insures that the water leaving the system is of the highest purity

Cation di resins (positively charged) remove excess : sodium

Compact Reefkeeper Filter Pack Catalytic Carbon Upgrade ::Upgrade to Catalytic Carbon indicated by a blinking 'x10"Compact Reefkeeper Filter Pack This pack includes: 1) 10 micron sediment Poly Pro 1) 5 micron Coconut carbon block 1) one micron Coconut carbon block and 1) in line DI. *Upgrading to a Catalytic Carbon stage removes on average 5 times more Chloramines than any carbon block on the market (including the ones specifically designed to "bust" chloramines). The option above adds Catalytic Carbon cartridge in place of 5 micron carbon block. For use on all