How to tell if your tank can be drilled?

[fencer]

Even the old style hagen 4 fts?

[mike31154]

Originally Posted by fencer

Even the old style hagen 4 fts?

None of the Hagen tanks have any tempered panels. I confirmed this on their web site faq page.

And here's a link to a good way of telling if you're looking at tempered glass. You need a notebook/LCD monitor or any polarized LCD screen (most of them are) and a pair of polarized sunglasses.

http://www.salt-city.org/showthread.php?t=9542