Originally Posted by m00se
Yes, that T and barb is for a set up on the output of a canister or other generic pump configuration. Lots of people will remove the red bleed valve on the top of the cap of the filter and thread the CO2 hose into that hole. If you do that you lose the ability to burp the air out of the filter unless you arrange a bleed valve on the CO2 line somewhere. If you get the Mag with the skimmer impeller it comes with an intake adapter with a nipple to connect your CO2 hose (it would be air for the skimmer if used as intended), so you don't need that T fitting or barb arrangement. Hope that's clearer than mud
thank you for clear this out. Now i just have to wait for the parts to arrive.