Compact Reefkeeper Filter Pack Catalytic Carbon Upgrade ::5 Micron Carbon Block You would want to change

You would want to change these filters at least once per year

Attach an inline ball valve in the tubing after the PSI gauge

the pump will not stop forward flow of water even if the motor is turned off

This Tsunami Filter pack is thirsty for your TDS

Compact Reefkeeper Filter Pack Catalytic Carbon Upgrade ::5 Micron Carbon Block You would want to changeCompact 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