drilling a tank

[Snaz]

To ensure the glass is not tempered view it with polarizing sun glasses. If it is tempered, a pattern will appear, no pattern and it is safe to drill.

[sphelps]

Originally Posted by Snaz

To ensure the glass is not tempered view it with polarizing sun glasses. If it is tempered, a pattern will appear, no pattern and it is safe to drill.

You'll need another polarized filter on the other side of the glass to see the pattern. For practice try the side and rear windows of a car for tempered and the windshield for untempered.

I've drilled a few tanks half full, but I wouldn't recommend it. Much better in the long run to start over.

[blueyota]

ok thanks for the replys

if he decides to drill i will post results with pics

[mark]

get the video camera, if it breaks be good for youtube,

[Blue-Wolf]

I have drilled my tank, but did it empty. Used my Dremel to do it. :P That is Youtube worthy. 20G Non Tempered tho. I have heard you can do Tempered, but not recommended.

Maybe ask your friend if he wants fish on the floor if the tank breaks.

[plutoniumJoe]

You can not drill tempered.

[Dez]

I drilled a 160 gallon half full about 5 years ago and to this day the tank is still running fine. It was too big of a tank to take down so that was kind of our only option. Just sprayed water on it to keep the bit cool. Hope that this helps. Ideally though, empty is good. I just drilled my tank empty but not with a dam because I got give wrong hole size dimension, so I had to crawl into the tank and drill the vertical pane. I used one hand to drill and the other to spray water. It was 1/2" glass.

Des