Review on Enhancing Oxygenation and Aeration: Clscea 4 Inch Air 🐠 Stone Disc Bubble Diffuser for Aquarium Fish Tank Pump Hydroponics by Andy Ucros

Difficult to see in the photo but works great, produces very fine bubbles and I'm more than comfortable in combination with a jet waterfall that takes all the aeration in about a 500 - Gallon pond takes over. It didn't seem to work properly at first because the bubbles were coming out from the side of the stone and not the center, but I had to twist the air hose up and bleed all the air out of the stone. in the water while plugging in the air hose and it solved my problem and works great. And its weight is more than enough to keep it in one place. Overall a great product. Time will tell but I would buy it again.