This is the primary reason I purchased a 100 gallon Tenecor acrylic tank:
"The strength of acrylic tanks give their owners the peace of mind knowing that their tank will not crack, shatter, or blow out unexpectedly."
The 100 gallon acrylic is also light enough that I can move it myself. (I had to do that for initial set-up as well as twice when we had a new floor installed in the den (once to move the tank to the utility room and agian to return it after the new floor was installed.)