I followed this thread and Peter's youtube videos for two years even though I was just an anonymous visitor here. I created this username just to express my sympathies and shock of what happened here.
It's relieving to hear that none of you got hurt. Though my greatest sadness comes from the fact that only 10% of those beautiful creatures survived. I cannot bear to think about the fear and stress they felt when their world collapsed in seconds.
That got me thinking about this tank. I won't talk about ATM specifically, but generally speaking, 5 year warranty, whether they want to claim it or not, is extremely short period for this kind of thing. Because that only means that after 5 years, you are left alone and anything could happen. Reading between the lines could tell us there's a reason they opted only for 5 years for +300gal tanks and not 10 or more.
You rebuilt your house and basement, not to mention everything else you did to make it work. In the end this tank was just a framework of the much much bigger, huuuge world, dedication, passion and investment. It should have been rock solid and last a lifetime, not a single digit warranty years.
I don't want to sound as a smart ***, I'm just very sad how this sea world collapsed, thinking what shall be done in the future to avoid these kind of failures at all costs.
Since you will custom build your new tank from scratch (fingers crossed!), please choose and insist on a manufacturer who will be ready to claim at least 10 years and be extra responsible on the craftsmanship.
Stay strong and take good care! Greetings from a fan in Serbia.