I started running one of these recently. Seems like a solid piece of gear. Varios 4 pump is dead silent. The only sound is cavitation if you let gas build up in the top, but that's easily purged. Holds just over 2 gallons of media. Mine was shipped without a few O-rings and pH probe holder. CoralVue got it all squared away pretty quickly.
Good to know! The guys over at CoralVue are good people.
Can you post a pic of yours after you set it up just to show CO2 in and where you're pulling from. It looks like the self-filling bubble count window is where the CO2 goes in on the top? What is the 1/4" quick connect on the cross fitting for.
If you can save the picture above and label all the 1/4" quick connects...that would be great.