Stagebob

Anyone have experience in using helium to produce bubbles front of stage to use in underwater scene? I guess we can just pump helium through detergent solution, but not sure of best way to control size of bubbles. Just trying to look at feasibilty of producing a rising "curtain" of bubbles.

Anyone have an idea as to what can be used as an inhaler prop? I need a prop that gives the sound effect of an inhaler being used by actor. Need to hear the gas release, but cannot find any compressed gas cans small enough to look like an inhaler. I would prefer that the inhaler is seen in action. The only thing I can think of is somehow putting an air duster can in a pocket and operating it at same time as prop. Any other suggestions would be welcome.