Making hole in glass?

[bytal]

How are people making holes in their aquariums for their sumps? I want to make a sump soon and I havn't seen it mentioned anywhere. Thanks

 

[AMDPhenomX4]

This site will help you. Glass-Holes.com dope aquarium stuff
People normally use a diamond tipped hole saw and water spray to keep the cut cool. Most aquariums can have holes drilled in the back.

 

[ccCapt]

I drilled my sump. Pics and description here.
http://www.aquariumadvice.com/forums/f20/125-reef-build-100035-3.html