Order by bag or pallet. Atlantic Pool Supply provides top grade, high quality Vermiculite based products. Vermiculite is a natural, inert mineral found in many parts of the world, including right here in South Carolina. Atlantic Pool Supply provides Vermiculite from Palmetto Vermiculite. Our Vermiculite provides exfoliated vermiculite to the pool builder, construction, horticultural and manufacturing industries. Palmetto Vermiculite offers a wide range of particle sizes to suit individual customer needs.