Browsing through reefcentral I ran into a post about a guy who had all his corals wiped out after storing his water in rubbermaid trash can.

I had left the water mixing for 2 days in a rubbermaid trash can before doing the water change. The worst part is that I saw a white film on the top of the water and didn't think nothing of it.

DOH !

You can read more here

http://reefcentral.com/vbulletin/sho...hreadid=142357

Apparently only certain trash cans are food safe.
Hope this helps others prevent a death in their tank.