30 gallon breeder glass thickness

[smhray]

I got a used 30 gallon breeder tank with dimensions of 36”x18”x12” (LxWxH) and I was wondering if I could use it since the glass is only 4mm thick. It has the framing around it still in perfect condition too.
Ive been having trouble finding tank specs from aqueon and I am in Canada and can’t call a US number.

 

[Jekyl]

Fill it to the top and check for bowing. Let it sit for a week.

 

[smhray]

Fill it to the top and check for bowing. Let it sit for a week.

Thanks I’ll do that right away. If there is no bowing then I’ll be all good to go? Or is there other things to look out for too?