Taking a dive into saltwater

Gill Roy

Gill Roy

"Up to my neck"
Nov 6, 2007
102
0
0
New Port Richey, FL.
I have had freshwater tanks since I was a kid but never salt.
Well I found a sweet deal on a 120gal and I have to decided to take the plunge into saltwater fish keeping.
I want to drill this tank for overflows and returns.
Someone told me you can't drill tempered glass and some tanks do have it on bottom.
How can I tell if the tank is "tempered glass" or not?
It seems like it is some bit thicker than the sides are.......
 
Use polarized sunglasses. If the glass appears to have dark grey spots then it is likely tempered glass.
 
One of the many useful things I have learned during my short tenure as the resident noob here on AquariaCentral... it is a gift that just keeps on giving.
 
I tried the polarized shades and didn't see any spots or such.
However I tried them on a "known tempered" glass door for a rotisserie and didn't see any either. Maybe that is a different kind of temper?
:cool:
 
or maybe try a different pair of sunglasses. The glasses that I use for fly fishing are polarized and when I look at tempered glass it is noticable.
 
ZSandmann said:
All sunglasses aren't polarized. If you have a pair of the 3D glasses they have been using in the movie theatres lately those would work as they are cross polarized.
Click to expand...

I am most certain that the glasses I used for the test are indeed polarized. I am in the optical profession and made these shades myself.

Shouldn't there be some sort of etch or sticker stating if it is or not tempered?
:help:
 
I've only seen such a sticker on a couple of tanks. I don't think it's a normal practice though. Hey, I could use some new shades? ;)
 
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