idk if this will help any, but i have a false bottom on my vivarium.
What I did was use a plastic egg carton, that you can get at a home depot. we just cut it to size and ziptied the ends together, then used window screen to cover it. Then I just used s expandable foam for terrian and sealed it with a 100% silicone caulk. Just thought i'd throw that out there. Hope it may help.![]()