If you have a vivarium ... What SIZE

I have 1 40 gallon breeder going for my Dart frogs.(soon)
and terrariums, I have a XL Exo, 2x 20 Longs flipped.
 
This is becoming most revealing. Most have 20 gallon tanks with almost an even split between the 20H and the 20L.

Are there any others that want to record there tanks?
 
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