I don't know about all this...but tell that dumpster diver to stop putting a good tank on the side like that on the ground. I'm just anal and would never rest the tank on a viewing side like that even if it had the plastic brace...LOL
yeah, its easier to just buy a tank so you know its not defective or something is wrong with it. besides especially if I found it in a dumpster I would probably just get an acrylic one for $100 on craigslist with stand light and filter