hygger Aquarium Air Stone, 2.3 Inch Fish Tank Bubbler Stone Kit Makes Super Tiny Bubbles, Ultra-High Dissolved Airstone with Stainless Steel Base Aquarium Fish Tank and Hydroponic

Works fine. Fairly small bubbles, but not as small as some of the white solid air stones. With a adjustable valve works for my shrimp tank.

Aside from the pump, this little guy comes with everything you need to get the bubbles flowing! It produces very fine bubbles and can be adjusted using the control valve so you can give even very delicate swimmers, like bettas, that extra boost of entertainment and more oxygenated water. It works well, is easy to set up and start, and the design succeeds in producing plenty of small bubbles for your fish. I’d definitely recommend this for any small tanks.

It worked for 6 months and then started splitting apart making large, loud bubbles. Cheaply made landfill-ready item.

Good except for the noise. it makes a weird squeaking noise when air gets pushed through. especially if you turn the airflow to low. lots of small bubbles 🫧

UPDATE: after about 9 months of use with no issues, the air stone started producing massive bubbles. I took it out and cleaned it off hoping that would fix it, but while doing so I realized that the stone had come loose from the base and that's why the bubbles were so big now. Not exactly sure how to fix this, will probably try gluing it back in using an aquarium safe silicone. Not the end of the world, but not very good longevity for a product like this so I reduced my rating to 2 stars. I was pleasantly surprised by the quality of this air stone! It's smaller than I was expecting but that works in its favor for me. I was also impressed with how fine the bubbles were considering that it isn't marketed as having ultra fine bubbles. The accessories that it came with are nice but not of the highest quality. I will probably change out the check valve, but I didn't buy it for the included accessories anyway so that's not a concern for me.

Very satisfied with this air stone. Nice small bubbles solid design looks like it will last a long time.

Do not waste your money. It stopped working.

Purchased a few before this, ended up returning all of them and keeping this one. It’s very good and produces a lot of bubbles even when there is algae build up on it. Fish are very happy