CO2 Scrubber and Protein Skimmer

[DatReefGuy]

Was doing a water change tonight and cleaned my skimmer cup. Fired everything back up and noticed that there was a ton of water in the skimmer neck. I disconnected the CO2 scrubber and the bubbles immediately came back and produced nice thick foam. I plugged the CO2 scrubber back in and the protein skimmer neck instantly filled with water with very little bubbles. I never noticed this before, does this sound normal? Pictures are posted below.

 

[afboundguy]

My guess is something is blocked in the CO2 scrubber line or severely restricted causing there to be decreased or no air coming in.

 

[DatReefGuy]

My guess is something is blocked in the CO2 scrubber line or severely restricted causing there to be decreased or no air coming in.

Possible. I'll have to investigate a little more when I get home from work. Don't get me wrong, I am producing some good skimmate with no CO2 Scrubber.