Hey this maybe a stupid question, but is it 100% safe to have the fake exoterra backgrounds get wet and/or submerged in water? Now I know chemistry and that leaking of toxic organic compounds occurs with many plastics (even though the plastic industry won't always tell us that) and that other materials such as glues, metals, etc can pose a problem. Who has personal experience with this material? From what I know polystyrene is fairly inert/stable chemically speaking and physically speaking. Oh plus how much heat can it handle (IE if there is a heat lamp above it will it melt (talking a small wattage like around 60 watts at the most).