I tested the bubble generator with all kinds of situations, different kinds of support mesh, one or two layers of screen (reticulated foam sheet), different nozzles, etc. Eventually I got settled down with a good combination of everything. So I then made a tray with some wood and use the vapor barrier material to seal the bottom and wrap around the bubble box.
First clip shows the scene after total fill and the second the complete process of filling an empty PyraBox.
Today I am going to test another bubble generator and you can watch it LIVE at https://pyrapod.com/live-cams