I think so? The center of the tank - the column island thing - is completely out of water. And from what I've noticed of them in the little Kritter Keeper I have them in for now, they mainly stay in the water or a few inches above the water on the side of the tank or on their rock. From everything I've read, it seems like they hang out mostly around the water's edge, and I guess I'd rather err on the side of too much water vs too little. Does that make sense?