90 gallon glass question

[lemkerailroad1]

I have been asking on here about covering 2 holes in the bottom of this 90 gallon tank, and thanks for the feed back guys and gals

but now after doing a lot of reading, there is no tag on the bottom that says if its tempered or not, you cannot see through the bottom panel as it is hazed so the 3d glasses and computer test are out of the question

so being there are 2 holes in the bottom, how can I tell?????

I see a lot of tempered glass explode and now im worried that I may fill this up and it shatter like tempered glass