I'm glad to know about the calci-sand. The dragon I wrote in about has playground sand, and since I have discontinued the use of the flourescent coiled compact and given her time outside, she has defficated, stopped closing her eyes, and oddly enough, has resumed eating (though not intaking the veggie amount she used to.) She is still finding dark areas of the house to sleep in when I let her out to roam and trying to dig pits in her tank . Neither of my females have ever been with a male, or even if Im in mistake of the sex of the smaller one- been allowed contact to breed because the smaller girl is very hostile to the bigger dragon and I am afraid of injuries. The smaller dragon (beautiful, I got from a reptile show for $30 due to her nipped back toes-missing like 3) is a girl and has a mixture of calci-playgroung sand, but now that I've heard this I will replace with playground. I intially bought her to be a companion to my adult dragon when she got bigger, but after reading posts on this site as well as observing her very young hostile behavior to the older one when she sees it I am afraid of any damage that might incurr, so I guess they will have to have seperate tank lives for life. I feel bad about depriving them of companionship though. I've always had cats, now 2 dogs and a couple fish tanks, worked at an animal shelter for years, and it's kind of my instinct to feel that all animals like some interaction with the same species.