So after I thought I knew what I was doing for the whole build... I changed my mind,(for lack of a desire to constantly be messing w/ water changes after it was established). Meaning I now wanted to do an external filter, post background/foundational work! How much does that suck
I realized that I was going to have a lot of issues with particulate matter build up from the build alone, not even counting inhabitants. Which would drive my water to a toxic halt pretty soon I imagined. That being said... I don't recommend doing what I did, it's not impossible, just a pain in the ace.
I started by contacting guys who know what they are doing, Glass-Holes.com... I had read and seen a lot of threads about doing this, prior to background work of course. In my newbie case,(which probably wouldn't have happened if I had joined here prior to starting the build

), I had a few other issues to work with.
I ended up getting a lot of info, not just about how to grind through the glass properly. Also how to support it from ruining the other pieces, i.e. duct taping the hell out of the piece I was grinding in X patterns to stabilize the pane. Stabilizing it from the inside, and of course insulating the inside from the hole falling through. Make a template to guide you, I found it much easier.
If you have not seen the "drill video" tutorial from Glass-Holes.com I highly recommend it.
I did end up cracking the glass a tiny bit, so after a small repair job,(and 24+ hours wait time). I was water tight and ready to go.
Purchases for this addition to the build:
I bought a 1 1/8" Diamond coated hole saw from local glass supply shop, for $30! (I wish I had planned it out so I could have waited for one from Glass-holes.com AT HALF THE PRICE! 1- 1/2 bulkhead thread x thread, lps for $6). Brass fitting 1/2" thread to a 3/8" barb,wrapped w/ Teflon tape,($3 at HD). Zoo Med 501 filter($40 on sale at lps).
