play sand

[Atlantic]

Hey guys....this is my first post, reall cool site by the way!
I need to change my substrate for my plated. I have used crushed walnuts, and found them really dusty. I am presently using coconut husk, i dont like it much and it needs to be changed. i was going to go with bone aid or something similar but i need a lot of it and it is really expensive here...
the local building supply store has play sand made by SHAW, is washed and has no salt. it is very fine, like sugar. My plated does tend to get a little bit of substrate in his mouth, i was just wondering if play sand would be a problem for impaction? Any suggestions or comments?