Well after about four months of the tank being up the back of the foam started to come loose and slip up from the back. So I had the fun of having to move my rock around and taking the back off. BTW, this I found is best done with a filet knife. So now I just have the foam still around the overflows and an open back that I don't know if I can get painted or not. I'm sure I'll try with a roller eventually, just need to take a break from it before I start throwing rock through it.