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Full Version: How to tell if a Glass Tank is Tempered ?
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Some possible info to help. Some, none or all of these may help. Anyone will more / solid info please post here in this thread which is destined to become a sticky in this subforum.

There's really no way to know without a microscope.

Take it to a glass shop they may be able to tell you.

Most aquariums are tempered on the bottom not on the sides

Check the corners for a label. Nearly all glass companies that temper glass will add a label to the corner of the glass before putting it into the oven.

Look at the glass through polarized sunglasses (expensive pair) to reveal a pattern in the glass = tempered.
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