i have decided to use sand as my substrate, but i live in a somewhat remote area and im trying to find some localy. what i have found is two different types. BLOW SAND, and MASONSRY SAND. they told me that the blow sand is what most people use in their sand boxes, and that the masonry sand is a finer sand. will one of these types work, or should i hold out until i can get my hands on ACTUAL play sand?