Hello

Place your laptop screen behind the pane of glass and put on polarized or 3D glasses if you see any colored lines or swirls it's tempered.
 
I found out that a 29 gallon tank was tempered by drilling it. Lol! I made it about 1/2 way thru before it exploded.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

  • Yes!

    Votes: 32 45.7%
  • Not yet, but I have one that I want to buy in mind!

    Votes: 9 12.9%
  • No.

    Votes: 26 37.1%
  • Other (please explain).

    Votes: 3 4.3%

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