The reply from Deep Blue:
Hello,
Thank you for contacting Deep Blue Professional.
Please see the attached tempered glass chart for information regarding the tempered status of all of our tanks.
You can also see this information in the resources section of our website – http://www.deepblueprofessional.com">www.deepblueprofessional.com</a>.
Both the reef ready (13057) and non-reef (13058) versions are completely non-tempered.
Be advised that the tempered status listed there is for tanks as they are currently produced, and some older models may at one time have been produced with tempered glass panels where current tanks are not. It is always best to thoroughly examine the plate you intend to drill for the Tempered Symbol that marks all tempered panels on our tanks. An image of this symbol is shown at the bottom of the attached chart.
Hope this helps,
DBP Customer Service
Deep Blue Professional
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Then they attached the same link that Demond did.