I just purchased a new Elite Aqua Fizz air stone today (at 99 cents how could I go wrong?) just to exparament and see how additional bubbles would look in my aquarium and I must say I was really impressed with the results...it was the smallest one available about the size of an ice cube and I figured it wouldnt do much but to my surprise it packed quite a punch. Has anyone else had these kind of results with airstones or is this just a fluke? My boyfriends mom had one that was meant to create a wall of bubbles but she had to poke holes in it with a pin to get the bubbles to come out properly. The air pump im using is small and looks very very old (I couldnt even begin to guess what kind it is... and its quieter than the filter... but evidently it works very well. Iv been having great luck with this stuff today I hope I dont jinx it. :)

A small stone will work well because, unlike a large bubble wand, there isnt many areas the air needs to get pushed into. Your air pump is enough to power the small air stone. Glad it works for you! and the fish will enjoy the increased oxygen (from the surface agitation ofcourse).

I just open up the venturi on my powerheads and the fish either swim against the jet of bubbles and water for exercise or turn around and get shot across the tank. It's kind of a playground for my gars. They love it.

I think for some fish it's kind of like an exercise wheel you'd put in a mouse cage for fish.

Before my Red Lobster(Cray) died he used to sit on top of the air stone and move claws and stuff all over his face. It looked like he was washing has face and taking a bath it was pretty funny.