Help!!!

[Arcbound Phyrexian]

Ok, so I am trying to make a paludarium. I started constructing my background out of extruded polystyrene foam and 100% silicone. Everything was going great. (It even looks good!)

I then sprayed the back (just the back, thankfully [I hope]) with black Krylon Fusion spray paint as I've read about how it is safe for aquariums and how others have had success with it on blue foam. I, however, don't seem to be. The paint made the foam on the back "melt." There are little holes where the paint ate through a bit all over it.

Have I just made my structure unsafe for animals and completely ruined all my work?! Is there a way to fix it?

Also, how can I continue (or, God help me, start over) without the same thing happening again?

[JoeG]

Yeah, spray painting styrofoam is gonna make it melt. the propellant and accelerated driers will react with it. Acetone will also do the same thing. Other than the damage, I dont think you ruined anything unless the paint is not sticking.
I am guessing you wanted to black out the back? That's better done with spray paint on the outside of the glass or use dark window tint on the outside OR black silicone spread inside the back glass.

Fusion takes 7 days to bond and cure to plastic which is what it is meant to be used on. Once it is cured, you should be ok, but if its flaking off you need to make sure to remove it or your animals could ingest it.