Review on 🐠 Aquarium Air Stone Bar: Silent and Subtle 6 Inch Fish Tank Air Diffuser with Control Valve - Ideal for Guppy, Shrimp, Exotic Species! by Lisa Watson

Bought over a year ago and still working as good as the day I put it in the tank. It gives off a large number of small bubbles. I can't count the number of bubbles I've bought over the years. Most didn't work well. They either produce very few bubbles or they don't work for more than a few months. I've cleaned them, soaked them, etc. but couldn't get any of them to work properly. To be honest it's amazing. I will never buy another brand again.