I search here but can't find the topic. I took out the eyeball on one bubbler that has never acted right after it blew for awhile, turbulence issue. Off the side of the fitting under the eyeball, there's a piece of flimsy looking, almost cellophane, piece of tape that dangles to the middle. Ahah, I found my issue! So, before I ripped it out with the needle nose, I looked in the other one, same thing. Is it some kind of diffuser? It looks too flimsy to be part of the system, but they look to similar to be something from construction. I would have to get a pic tomorrow after light up.