In reality

✔ 1 x Inline check valve

Ideal for reefkeepers and labs needing up to 50 Gallons of ultrapure Zero TDS RODI water a month

0" diameter bottom plate

✔ 1 x standard 1/4" x 1/4" x 1/4" Divider Y (Union Y) Fitting

Neptune Filter Pack with DI Tubing In realityNeptune Filter Pack with DI Replacement Filter Pack and DI pack for Neptune: 1) Ten Micron Sediment, 1) Five Micron Carbon Block or catalytic carbon, 1) One Micron Carbon Block and 3) Nuclear Grade Color Changing DI Resin cartridges. *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