Alright, this may be a stupid question, but it has always been buggin me. For my herps I am limited to using tanks as I'm 16 and my mom is female dog, lol.
What I always believed to be ten gallon tanks look to small to hold ten gallons of water, so I have the dimensions:
L 20
H 10
W 12
And my main quesiton, my so called 50 gallon hexagonal tank. I don't think its really a 50 gallon, so maybe you guys can help:

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0.0.1 Eastern Painted Turtle
0.0.1 Indonesian Blue Tongue Skink
0.2.0 Leopard Geckos
0.0.1 Northern Water Snake

