I'm trying to figure out where people get these big aquariums that are larger than the 210 (72X24X29). Do All Glass, Perfecto, or Oceanic make tanks bigger than the 210? I keep seeing these 7-ft and 8-ft tanks that look like production line stuff (at least from the pics). I know glasscages makes big tanks like this but I get the feeling that there are other manufacturers out there. Also, are there standard sizes for some of these larger tanks?