I have the opportunity to buy a 75 gallon aquarium with either a tempered glass bottom or non-tempered glass. The 48" x 18" bottom pane of glass is 1/4" thick (guessing here) but the non-tempered glass is at least 3/8" and maybe even 1/2" thick. I know that tempered glass is much better for impact resistance for small objects at a high velocity. Here is my question:
Which of the two tanks would be less likely to break/crack if a rather large (40 lbs?) rock was dropped a rather short distance (18"?) onto the bottom pane of glass.