Yes you can i bought a JBJ 12 gallon DX.
And have it pumbed into my main tank.
Its a 3/4 inch hole right through the back of the tank near the bottom and have a durso plumbed in.
I plan on putting one for the return line but havent gotten around to it.
For now i just have a hose dropped inside the lid nice and secure like.
see the pics to see that you can do a 12gallon JBJ, I should state that yes i may of had the only one in the world that can be drilled but it was a breeze.
I have also drilled a fluval edge and can say it is not tempered on the back either.
