Glass and acrylic thicknesses

[Quo Vadis]

I am going to be building a pond liner plywood tank that is 90"x48"x36". I have looked at the calculators of how thick the glass should be, but I'd like some people the chime in with what they think, so I make sure I was understanding them right. I am thinking of doing 3 separate windows for the front so that they don't have to be so thick, so I am interested to know how much thinner I can go in that case. So how thick the following would have to be:
Glass -
1 window 90"x36"
3 windows x 30"x36"
Acrylic -
1 window 90"x36"
3 windows x 30"x36"

 

[fishguy306]

While length has a bit to do with glass or acrylic thickness needed, height is much, much more important. Either glass or acrylic you will need the same thickness for whichever route you go. I haven't checked with any calculators, but I imagine at 36" you'd probably want 3/4" glass and at least an inch acrylic. I would find one of the calculators online to confirm this though.

 

[lardieleftover]

Don't forget if you do multiple smaller sized windows, you will hve to compensate with very strong bracing to hold them in place