Adf Use A Bubbler For Air?

[metulburr]

Can African Dwarf Frogs use a bubbler for air? My tank is 18 inches high. They get to the top no problem, but not without a lot of swimming. So i was thinking of putting a bubbler in to allow them to breathe closer to the bottom. And if that doesnt work i was thinking of of putting the bubbler under the tree stump where the frogs hang out, to catch the air at the top.
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Would any of this be useful to the frogs, or would they not care and go to the top anyways?

 

[Bubbelzzz]

I guess you mean that they will get air from the bubbles that are floating to the surface? I don't think that it would work or that they will use it.
18 inch (45cm) isn't that high is it? I can imagine that in their natural habitat, they have to swim even further.