Oh, and the blue grid is 1/2".





BTW, zebra #5 does not have a deformed head. The container warped the picture. I would have taken another but I didn't notice till it was on the computer and wasn't about to bug him again.
I just put them in a new tank based on info I found here and had some interesting behavior. 4 zebras went into one cave. One zebra kicked everyone out of a cave. One fought him for it but lost. the two smaller ones decided to hang out together under a small overhang. One ignored the caves completely and went to hang out under a piece of driftwood. That one finally came down but hung out at the outside edge of the caves without really going in.
Don't know if that helps at all but I figured it couldn't hurt.
Matt