Review on Marine Metal Bubble 3 Inch Diffuser by Belinda Rivas

Good even bubble flow and reasonable price. My only issue is that suction cups are usually short lived and you're out of luck if you don't have a replacement with EXACTLY the same attachment point. This element has no flange or protrusions that can be used for attachment in other ways. For my application I removed the cup and had to figure out how to weigh it down. Hot glue and a stainless bolt with nuts in the center hole (where the cup was)! Now I have a sustainable livelihood.