55g Drilling Shadow Box Overflow Possible Cracking

[Alev_Apex]

I wanted to ask before I drill 1" or 1.5" (can't remember the size) holes at the top middle if it would cause the glass to bow and possibly break. My 55g is tall and narrow but I wanted to see before I drilled if it's going to cause it to crack and break. Thanks!!!

 

[Swingline77]

How far apart should I drill bulkhead holes?

They are 1 inch bulkheads that will be installed in the bottom pane of glass on an external overflow that I'm building. There will be a total of three holes for a bean animal style overflow. I just need to know how far apart too drill the holes?

www.reef2reef.com

The farther under the waterline a hole is, the more stress there will be. People are able to drill all sorts of holes, seemingly without problems.

With diamond bits, it's pretty easy. I like to make a dam out of clay to hold a pool of water around the hole, and also use a wooden template for the diamond bit, clamped in place, so that the bit doesn't wander.

 

[Alev_Apex]

Thank you for the reply! I've been persuaded to find a bigger tank. Plus the tank would be too narrow to aquascape...

 

[Alev_Apex]

I will definitely use the technique when drilling!