Review on 🪟 Bendable Bubble Wall Air Diffuser by Penn Plax by Sylvia Young

It arrived and I installed it in my tank but it's not as heavy as I expected and I had to work hard to stay on the bottom of the tank. The other end of the bubbler is open. It comes with a plastic plug, but there's no other way to install it other than cut off the other end and then glue it on. Not sure as it came with zero instructions. I went to the Penn Plax website and nothing there either. I use it with a Tetra Whisper 40 pump and I seem to get bubbles through the wand but big bubbles come out the other end. I'm discussing the possibility of getting a cheap aerostone and a few inches of tubing and attaching it to the other end. I do not know what to do.