Question regarding Seapora tank drilling

[Sal.A]

Hi all and Happy Holidays
I have a question, we are moving back north and the home I am buying has an existing 90 gallon Seapora tank. I know they are tempered on the bottom most likely but I am gonna need to drill into the side for a small over flow box. Does anyone have experience with drilling any of the sides of this tank and do you believe it it is safe.
thank you
s

 

[TX_REEF]

there are a few ways to tell if the sides are tempered, and if they are not, you're good to drill

 

[Sal.A]

there are a few ways to tell if the sides are tempered, and if they are not, you're good to drill

Thank you