This is what a forum Moderator posted in another fish related site...
Of course you can! Just don't use "playsand" as it will compact too hard, and if it gets kicked up, it takes forever to settle.
I use and recommend Silica (sandblasting sand, pool filter sand, decor sand [Home Depot]), All- purpose sand [Home Depot].
Other "sands" like Aragonite and Crushed Coral sands can make the water harder, and the pH higher, so unless your fish require that, I would avoid it.
i thought you shouldnt use silica based sand
and avoid aragonite