Re: [Killietalk] Drilling 10 gallon tanks: some are tempered glass !

[Dennis Heltzel <killies at fishroom_net>]

I believe that all the cheap 10 gallon tanks are tempered. I think you 
can tell by the weight, as tempered glass is much thinner and therefore 
lighter. Smaller tanks are less likely to be tempered because the 
thinnest grade of regular glass is strong enough. I've heard of a lot of 
success drilling 2 1/2 and 5 gallons, but a lot of problems drilling 10's.

Dennis

Richard Pierce wrote:

>I was drilling a 10 gallon tank tonight when suddenly there was an
>ear-shattering "Crack" and the back of the tank was cracked into hundreds of
>small pieces!  Apparently the back of the tank was made from tempered glass!
>I was not aware that smaller tanks might be made out of tempered glass.  I
>believe that the tank was Perfecto brand and may have been sold under the
>"Top Fin" label from Petsmart (see the attached picture of the inspection
>label).  Has anyone else had this problem with drilling the backs of tanks?
>Is there any way to visually tell tempered glass from plate glass?
>Perfecto's web site is useless.  I have also attached a photo of what
>happens when you drill tempered glass in case anyone in curious.  I guess
>from now on its All-Glass tanks or nothing!
>
>  
>

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