I was enjoying a cup of coffee this morning when it suddenly hit me.... How will I run the cords out of the tank for an aquatic heater and filter..... A sinking feeling set in when I realized the best way would be to drill a hole in the side of the tank (because taking cords up 36 inches won't leave a lot of slack to make it to a plug).... Then a knot formed in the pit of my stomach.... I had never drilled glass and the thought of cracking the side of this tank at this point is sickening. I went to a big box store and picked up a diamond coated drill for glass and plumbers putty.

I did 5 test drills on one of my cheap 10 gallon aquariums. The first two tries cracked the tank... the next 3 were perfect sooooo I setup on my 40B, marked the hole, setup the putty bowl, and drilled.... Perfect hole. Phew! NOW I can spray foam.