Originally Posted by mr_X
Why are you drilling returns through the bottom? For the closed loop? Are you sure the bottom isn't tempered? They usually are.
The tank was a custom build and I spoke with the guy that made it, so I made sure the bottom isn't tempered.
The glass is half inch thick.
Drilling through the bottom seemed like the best way to hide the return because I'll build my aqua scape to cover most of the locline so just the outlet nozzle is visible.
Also, on the back of the tank, there's only 4" of space between the overflow box and the edge of the tank on either side , so not much room to drill there.
What do you think? Going through the bottom not a great idea?