For use with water that is very hard or has an excessive amount of rust

We offer many system options directly on the product pages so you can get the exact system you need

20" Refillable Cartridge - Clear

Also available with 3/8" or 1/2" fittings

lab-grade RO/DI water for your reef

20" Activated Carbon Block 10" For use with water that20" 5 mic. Activated Carbon Block. 2. 5 GPM HFR (High Flow Rate) carbon block filters allow your membrane(s) to get ideal pressure for better rejection rates better membrane rejection rates = longer DI resin life. 20" 5 micron Carbon block Illustrations Diagrams Instructions How to Change Filters