Hi,
That looks like a great tank and could be set up as a river with big rocks, strong power heads and some hillstream loaches and whitecloud mountain minnows. The minnows come in a couple of different colours for variety and there are several loaches which would be suitable.
http/www.loaches.com/hillstream_loaches.html have a look here for more information
Emma
most crabs need to have some land to crawl out of water on. They also might snag a few small fish like white cloud minnows. If i had a tank like that i would put a school of afican tiger fish or larger more aggressive fish like red devils,stingrays, red bay snook, and maybe if an arowana would fit.
I could see it as almost a cross section through a beach - but of course freshwater, with a thin layer of sand at the filter end, building up to a small sandy bank at the other end, the crabs would love that and you'd be able to have areas where the fish could get out of the crabs way.
Looks like itd make a really interesting tank!!
(you could just hire a van for an hour to transport it)
On that website there is a waterfall thingy too is that included?