As far as substrates are concerned for the Leopard Gecko Eublepharis macualrius and Milk Snake Lampropeltis triangulum use washed play sand which is available from most home improvement stores. Pour the sand into the enclosure to a depth of 1/2” to 1”. I have heard all of the stories of impaction from Leopard Gecko Eublepharis macualrius owners and these cases have been found to be a normal behavior and generally related to not providing a calcium supplement when dusting the insect fare which is offered as food.
best by the premier breeder of the species Robert Applegate. Washed play sand can be purchased for approximately $6.00 for a 50 pound bag. This will last at least two months given that you’re only changing it entirely once every couple of months and in between times doing regular spot cleanings.
For the Corn Snake Pantherophis guttatus and the Rosy Boa Charina trivirgata I use a mixture of ½ a part washed play sand to 1 part ground cover bark. Ground cover bark is also purchased at the local home improvement store and is usually about $3.00 a bag. No matter what species you choose to keep you must provide a way for them to access fresh water. This is best done by providing a water bowl which the reptiles can enter and completely submerge themselves without knocking it over.