I found the Lizard-landscapes.com page and they make herp furnature out of styrofoam and grout. I love the idea and stayed up to 1am watching their videos!! LOL So Today I want to buy some styrofoam and play around a bit, just make some small hides/decorations too see how it goes. I am thinking of putting hermit crabs in my 44gal tank and I wonder if the grout is strong enough for them, they will pick at it. I was thinking if grout is too easy for them to break off I can use cement instead. Any ideas? I suppose I can coat the hermit crabs hides and background with a few extra layers of grout too make it less likely for them too pinch some off.