Purchasing used aquariums and tempered galss

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Tempered isn't as common as you would think. The only ones it is really common on is 55 gallons. After that, it is commonly only the bottom pane that is tempered. I would check to be sure.

So are my 55g most likely tempered on all sides. The bottom does say tempered.


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So are my 55g most likely tempered on all sides. The bottom does say tempered.


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Not necessarily. The odds are better that it is, but not all manufacturers use tempered sides.

It's actually more expensive to use tempered and it really doesn't gain you much strength in the long run.


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tanks over a certain gallonage will be plate glass anyways (unless homemade), tempered glass would shatter under the pressure of larger tanks.

Really? My 8x4x3 is tempered base and two long sheets (8x3) it is yet to shatter.

I always thought it was the other way around? I know most tanks built at work when I was there we used tempered for the larger units.
 
Really? My 8x4x3 is tempered base and two long sheets (8x3) it is yet to shatter.

I always thought it was the other way around? I know most tanks built at work when I was there we used tempered for the larger units.

Tempered glass, a.k.a. toughened glass, is stronger but I have yet to find any solid information that it withstands greater forces any better than standard plate glass in a basic water containing method. I've not seen any calculation that gives more tolerance based on tempered glass vs. plate glass.

It is most certainly better at withstanding point pressure such as falling objects. My guess is that it has something to do with potential for objects falling in the aquarium as tempered glass is much more resistant to this kind of damage.
 
from what i hear from my glazier store front installer "store" that when their tempered the glass's strength is double of the original glass thickness.. so if i tempered a 1/4" thick glass.. it's hardness is now at 1/2"...
 
from what i hear from my glazier store front installer "store" that when their tempered the glass's strength is double of the original glass thickness.. so if i tempered a 1/4" thick glass.. it's hardness is now at 1/2"...

Hardnes is a different factor. What is important for the sake of aquariums is deflection. Tempered or not, it makes no substantial difference in how much the glass will bed before it breaks. Its really just how it breaks.
 
Thanks Pharaoh, makes prefect sense what you are saying. good question to ask some of the guys are my work.

I know if tempered glass is tapped with something solid on the rim it can crack with ease :| for this reason I insured there was 90 degree ali ran all around the glass for added protection.

Just to add though, when we made a 12x4x4 at aquarium job the glazier told my boss it could not be done with plate glass due to the run it would have to be extremely thick plate glass to be safe ( not bow ) but with 1" thick double glazed tempered it was fine so there must be something being missed? else the double glazing is what would be actually reducing the chances of bowing ?

Interesting interesting
 
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