hello all, i just upgraded my female to a bigger enclosure and am going to be putting a laying bin in there for her now! My question now is what mixture of stuff to put in there! I read a lot of people using 50/50 soil/play sand...my question is what else can be used? I would have to order play sand cause i just called around (toysrus, lowes, HD) and play sand is seasonal here (new england). I was thinking of using 50/50 eco earth and organic soil i sifted? is this something that will work?