07-18-2006, 09:48 PM
I recently built my first background and am having a problem with my Great Stuff. I used the red-can kind and for some reason about a week after I built it it is showing signs of receding from around my drift wood. What could be the cause of this ? Has anyone had this problem ? Am I using the right kind of Great Stuff ? I siliconed the back of the tank before I used it and then let it harden over night (both the silicone and the great stuff).