If the noise from your recirc is from chopping bubbles then pressurizing the chamber will help. Might be worth experimenting with.Okay..got it. Didn't know about this before. My versa does run very slow and my recirc pump is a bit noisy due to the co2 bubbles. Do you believe that a feed pump reduces this noise? I dont get co2 trapped at the top. There is a line at the top that feeds back into the recirc pump. It is a reef octo. I think most are like this.
If your versa is leaking at the quick connects, they have a tubing option that doesn't have any quick connects. It is just straight hosebarb.
As for the tubing option for the versa, the hosebarb option never made it to production. You can only get them with the push to connect fittings.