I should have figured out the acronym, but I haven't yet seen it written as CHE, haha.
The owner said that it's a bit bigger than a 40gal. Maybe somewhere in the 48-53gallon range. I'll have to double check and make sure, though.
And I'll definitely look into the CHE's.
Also, as a way of fixing a cover to the bottom of the enclosure, would hot gluing it down be a viable option? I can't possibly count all of the posts I've seen here and elsewhere that stress, "don't use tape of any kind inside the enclosure." So hot glue popped into my head.
-Josh