I have a 36g bowfront aquarium that I need to somehow make a well ventilated lid for, and of course they don't sell the regular lids for the bowfronts. (This is for my momma rat and her babies, not a snake). Any bright ideas on how I can go about that with my limited DIY knowledge? Don't really want to go out and buy another aquarium when I have these already lying around.

Thanks ya'll!