Tank build question

[cammyyax]

I am wondering about the required thickness of glass for a build. The tank will be 4.9 ft x 1.8ft x 2ft tall. There would be approximately 109 gallons of volume. I am wondering what thickness of glass would be required. Would 0.4 inch glass be thick enough? Or would it need to be thicker? Tank will have 1 Oscar just for reference. thanks