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 Sue Baccam

Produces the smallest bubbles I've ever seen. Smaller bubbles = larger surface area = more efficient ventilation. Evenly distributed over the length of the stick. I bought two and am using a 40-60 gallon Tetra 77854 Whisper Air Pump, 60 gallon which has two air outlets and a total airflow of 2.6L/min according to the Tetra website (cannot link to sites that do not belong to Revain). . In order to aerate an aquarium effectively, you need about 1 l/min of air flow per stick.