Re: 36 Gal bow front glass lid
An easy fix to do what you seem to be after is to use clips for rimless tanks:
I personally would not trust the gap to be small enough to keep frogs in; I use something like these on a terrarium.
More sophisticated solutions:
Best solution: don't use a bowfront tank.
I think I could turn and live with animals, they are so placid and self-contain'd.