Foam Backdrop

[Azilla]

http://reefkeeping.com/issues/2005-02/totm/index.htm

This months tank of the month is all foam backing and overflow.

Also note is used GREAT STUFF and this info is from the manufacture.

Constant exposure to water or sunlight will cause it to break down over time. If Great Stuff is going to be exposed to water or sunlight, we recommend painting or sealing it to prevent this degradation. Great Stuff is a non-toxic polyurethane foam, exposure to water will cause it to break down and crumble. The primary concern is that if animals were to eat these pieces, it may cause blockage.