So to appease you, here is a picture of the air pump running through the "filtration system".
The seals for the tubing are pretty much fail-proof. You can't see the inner side of the lid, but it's done up roughly the same. The chances of any water getting in from THERE is miniscule. The bigges problem is the rim of the lid itself, due to the "friction band" not actually fitting the corners, so any time there is any water pressure, the water will leak in at the corners. I'm going to solve this by gluing the entire lid on, after I've inserted the ants. This should fix the problem.
Also, due to the air inside the colony, I'm going to have to anchor it to the bottom of the aquarium. Gluing it to the bottom before filling it would probably be the best bet.
I am so convinced this will work fine, but I can't help but worry about not gluing the lid well enough. I would really hate for this project to fail because of something as silly as a tiny little crack.
Oh well... Time will tell.