Do you mean dry aragonite sand? Adding new sand directly to the tank will produce a dust storm...BAD!
Put it (the sand) in a bucket of saltwater with a heater and a powerhead for a few weeks and feed it small amounts of fish food every few days. That way, it will encourage bacterial growth and weigh down those tiny particles. When you add it to your tank, do so in small amounts and you should be able to avoid a cloud.