$16 for a 20lbs bag. Just picked up 3 bags for my refugium. Ask the cashier to price match with their online price.
http://www.petco.com/product/121742...Sand.aspx?Ntt=oolite sand&OneResultRedirect=1
http://www.petco.com/product/121742...Sand.aspx?Ntt=oolite sand&OneResultRedirect=1