Pure Silica Sand (which is almost like powder) can be elusive. Some Landscape supply stores carry this item – some don’t. But almost EVERY Pool Supply store does (it’s pool filter sand).
To locate your local pool supply store, jump on the Google machine and type “POOL SUPPLY” and your ZIP CODE in the search bar. Or you can just click here - Google.com/maps/search/Pool+Supply
ONLY USE THESE TYPES OF SAND -
Pool Filter Sand
Fine Silica Sand (All mesh sizes)
(The Finer the Grain the Better)
DO NOT USE -
Sand / Topping