So I just experienced a somewhat surprising event. I had made a background for a ten gallon out of pond foam with a single piece of wood yesterday, just to get some practice before trying to make a background out of foam for my 40 breeder.
Just now it exploded, blowing foam and glass out the back. Fortunately it was pointed towards a wall that had a large piece of cardboard leaned against it. It occurred behind the wood, so I assume the foam tried to expand behind the wood, but the wood was held in place by the cured surface of the foam so it couldn't expand anymore to the sides due to the small size of the tank. The pressure built, and it exploded... Sounded like a gun going off in the living room.
Anyway I thought I should share this experience, as if that had been pointed a different direction it could have caused severe injury, or massive property damage. The point I guess is to be aware that this can happen and to place your vivarium appropriately while curing.
Just now it exploded, blowing foam and glass out the back. Fortunately it was pointed towards a wall that had a large piece of cardboard leaned against it. It occurred behind the wood, so I assume the foam tried to expand behind the wood, but the wood was held in place by the cured surface of the foam so it couldn't expand anymore to the sides due to the small size of the tank. The pressure built, and it exploded... Sounded like a gun going off in the living room.
Anyway I thought I should share this experience, as if that had been pointed a different direction it could have caused severe injury, or massive property damage. The point I guess is to be aware that this can happen and to place your vivarium appropriately while curing.