Hi bivittatus, I agree, there`s really no such thing as too big of an enclosure for captive Varanids!
With that in mind, it would be very nice to see YOUR 20 something feet cages that you tell other people they need, also, details on type of heating/lighting, pool cleaning, etc, methods you use??
I know another member asked the same question of you a couple of weeks ago, but you didn`t respond (you`d said 20 x 10 feet was the minimum size for a V. niloticus)...
Thanks!