Review on Quickun 1.6 Inch Updated Crazy Air Mineral Ball Stone Cylinder Bubbler Plus Diffuser Aquarium Fish Tank Hydroponics Pump Airstones Diffuser 3/16" 5/16" Hose ID by Janet Battle

This is a repeat order. Every season I seem to need to replace the two air stones in our ponds. Either they get clogged with algae, or they get brittle and nozzle the breaks off when trying to remove them from the line.These are proper size and nicely weighted as advertised, and fit standard black air tubing.The bubbling is not 2" all around the surface of the ball, but more concentrated towards the center and coming up.There is also some variation in bubble size from one to the next, but, they get the job down.I will order this style again, when the need arises.