It wasn't made into a tank - rubbermaid makes those tanks out of thick fiberglass/plastic molds with the viewing panes - and you can buy them brand new like that...I just can't find the site that carries them.
and I said that if that wasn't what you were talking about(the white plastic with the wire supporting it) then show me. I had the wrong image of what you called a water container. I'm sorry for that
Sorry, I got confused by your wording - thought you meant that this tank on ebay was bought without the glass pane and turned into a tank.
I wish I could remember the site that sells these now - they come in five different sizes and look exactly like the one pictures minus the epoxy paint.
The only thing I see odd of this tank on ebay is the parts that are sticking out. Looks like he used it as a little self. I'd probably box it in with plywood so it looked a little more smooth, and probably stuff the open parts between the fiberglass and plywood with some sort of insulation to help keep heat in
There are several places that sell the big fish tamks. They supply fish farms and everything else. This is the one you want for allot of good water systems http://www.aquaticeco.com/index.php. This is another one that is very good, http://www.fishfarmsupply.ca/, I hope this helps.