I can't remember the number of tanks I've had break, blow out, crack, or pop seams on me. But, it's been quite a few starting with slate-bottom steel-framed tanks on up to acrylics. The most recent is this blown 285gal. You can see how much water was lost by the fill line. When it blew, the force of the water moved a steel tank base and blew the hatchery door open. Water shot 10 ft out the door into the yard. Also, I was standing at the front right corner and caught alot of the water on myself after the one second 'tick..tick' warning before the side blew out.