This is the foam "loch ness monster"my earation made today. The top is about 4 feet tall. Today was a high of 14 F and my diffuser is in 13 feet of water.
I bought this through the forum and it was easy to install through the ice. You can see the round sticks I was using. The old ones were at around 10psi out of the water the new discs are at 10psi in 13feet. My air is running in the pic as you can see the membranes are inflated about 1/2"..
