All sand will become live in the end. You can start like FF said and get mostly "dead" sand and seed it with live sand. Or if you plan on adding LR
then the critters from the LR
will eventually migrate into the sand. Living in PA you may be able to find aragonite sand in a Home Depot. This is the same stuff the LFS
sell for like $30 for 30lbs. In home depot it is labelled Southdown or Old Castle tropical playsand and you get like 50lbs for 10 bucks or so. But really sand is sand...playsand is cleaned well and is usually better than regular old concrete sand. The aragonite is prettier and contains calcium and carbonate.