It is 2 feet deepthickness is dependent on depth.
Glass/Acrylic Thickness Calculations
This is a bit of a research compilation for building your own glass or acrylic tank. Please feel free to post up another great site or thread that discusses the same topic. The more we have listed, the better we can compare all of them and come up with some solid guidelines. Thankswww.monsterfishkeepers.com
10mm at the very minimum, 12mm is better.5
5 feet long 2 feet deep and 2 feet wide
I am planning 15 mmWill it take the water weight