I have done a ton of research into tank makers in both the US and Canada. Got in touch with pretty much every well known one that I could find. Learned a lot in the process of what to stay away from and what subtleties to watch out for. What you will see, is some places are okay with using thinner acrylic and some others are not. My advice would be to stay far away from the ones that are okay with using thinner sheets as you really want to use thicker acrylic in the bigger tanks. I know you already know this but just thought it should be said. If American is using thicker acrylic I would go with them just on that fact alone. Using thinner acrylic allows the company and you to a certain degree to save money but any tank maker worth his salt would not take a risk. And there is a risk in using thinner acrylic. How thick are the sheets anyway from each company?
Edit:
Reading into this some more and it looks like a lot of people are having issues with American. What I would do is keep looking into other companies if you can that still do thicker sheets. As I said before, I wouldn't trust a company that would be willing to use thinner sheets on a big tank like this. They either don't have enough experience in the business to know better or don't care enough about the customer to recommend thicker acrylic. A lot of times you will see these companies tell you over and over again that thinner is okay that it would be fine etc etc etc. They are just trying to make a sale. Because if the other companies are using thicker acrylic at an obvious higher price, and a newbie comes onto the scene and compares prices, who do you think they are going to go with?
