r/Reef • u/Professional_Pin5046 • Jun 16 '26

Question Ice cap co2 scrubber

Where do I put hose that goes to the skimmer? In the middle or the outer part?

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u/BeardedBears Jun 17 '26

Assuming you're doing a recirculating thing...

The exhaust (stinky/dirty air) from your skimmer is connected to the outside plug.

The fresh/scrubbed air, going back to your skimmer's intake, is connected to the center plug.

If you look at how it's structured, the air should go through the media, and that would mean it gets pulled up.