For my new rimless tank I wanted to go with glass piping so I got a set of lily pipes. One of the things touted on the package was aeration so I took a little video of it in action.
https://youtu.be/cYXCLw7FDJU
I have about a 10 ft. length of it, and around a 3 ft. length of it. I forget the diameters, but I can measure that and tell you this evening. Trade preferred, but cash acceptable.
-Rich