Do you have a photo of your Co2 Scrubber set-up along with the skimmer and solenoid? I am looking to set one up myself and trying to see what a good set-up looks like....hard to find on YouTube. I have the Ice Cap Co2 scrubber
Sure...
Aeraqua Duo top has 4 holes that fit 1/4" ro tubing. I use 2 of them with elbows on the inside and then connect to a 3/8 ro tubing which is the perfect size for all the rest of the connections including the air intake.
This goes out the back of the tank. I keep the recirculation tube elevated so as to have no spots where the damp air can fill with water.
This leads down to the dual chamber scrubber.
Which has the solenoid valve sitting on top and controlled by the GHL switched outlets.