TCool
Aquarium Advice Activist
Yes there is! Make sure the air line puts in the air at the top of the bowl, the pressure of the air coming in will force the 'old' air out of the bottom of the bowl and it'll bubble up to the top of the tank.
I was thinking the exact same thing. Or, you could even drill a small hole in the top and to release some of the air. It'd probably be hard to get it just right tho, so you'd probably still have air coming out the bottom.
I kinda wanna try this tho. My gf says not to. I argued that it wouldn't be too expensive, but she says that my "not too expensive" ideas times 1,000 gets expensive. She doesn't know what she's talking about tho!