I've read that this substrate (from Zoomed) is better than playground sand because it is finer, and less likely to cause impaction. How old (large) should my girl be before I can safely house her on this? I don't know how old she is, but I've had her for 3 or 4 months and she was 4 inches when I got her, and is now about 6 inches long. I still feed her small crickets as opposed to the larger ones because they seem to be easier for her to eat, but I'm in the process of moving her from a 5 gallon tank to a 20 gallon tank, and would really like to make the change to Repti Sand.

