I read a post about playground "Old Castle" sand at Home Depot. Went to local store and they had no idea what I was asking for and could not find a listing for it. Went to Lowe's and they carry Quikrete #1113 playground sand, supposedly extra fine size. Looked at the MSDS and it is pure silica. Needs rinsing to remove dust before placing in tak. I am leaning towards using it as a base with some live sand on top. Lowe's was about $3.50 for a 50# sack.
