calci sand is a big NO-NO for snakes
it will get in side the scales underneath, also will affect breathing and will get the sand build up in and around the mouth
All the talk on the bag of easy digestion and no impaction is for lizards, Calci sand is considered to be much better ( in my oppinon its not, but thats nither here nor there ) Its thoguht that if they swallow regualr sand it can lead to those things
stay away from the sand ;)
Chris