*BEWARE*
I took my Cumberland slider to the vet today as she has been throwing up and she has a partial impaction from eating the sand.
Turtles digestion system is daily slow and sand does not get digested at all in their bodies so if your turtle is eating the sand you can have a serious problem if they injest a good amount in a short period of time it can clump up and cause impactions since it will not be digested.
Just a warning to all the sand users. There is nothing wrong with sand as long as the turtle does not eat it. Keep a close eye on your reptichildren while they are playing in the sand and if they are eating it remove the sand and take your turtle to the vet

