Well, it's not exactly sand. It's called "ESU Reptile Desert Blend Lizard Litter," and it's made of crushed walnut shell. It non-abrasive and digestion-safe. Also, because it is a plant material, it holds enough humidity to compliment my already-plenty-humid regional air. I've learned my lesson with real sand in the past. I should have been more specific... it's just habit to call it "sand."

And now I am looking around for the separate housing threads... I'd have never thought of separating them on account of them being seemingly totally in love with each other. It's like they seek each other out when they are apart...