Absolute Disaster.

[Madding]

I look at my 150 every day and tell it to be in one piece when I get back. It would destroy my living room if it cracked.

 

[Hebily]

My marineland system 12 bowfront got a crack in the bottom, too. Luckily, Mine started in the front of the bottom, and I noticed it catching the light, before it started leaking. I was able to get my 50 (I had kinda been planning on anyway... +good 'emergency fund'...) and get everything transfered over and the tank drained within the next couple days... it was drained before it ever started leaking, but I can only imagine what would have happened if I hadn't noticed that crack... and that was only a 12. I had thought it was a freak accident, or possibly from the tank getting hit with a pot handle or something (it was on the kitchen counter) but now I wonder if there is a bigger issue with their tanks. It would have spread right along the bottom and split the tank in two...

 

[BreezeRuehls]

Ouch, that's a huge bummer, but at least you have a hobby horror story....