A lot of people use playsand. It's not the end of the world. It's just really dirty, and it's also pretty light in weight, so if it gets kicked up into any powerfilters you may have, it could mess up the impeller.
A lot of people use playsand. It's not the end of the world. It's just really dirty, and it's also pretty light in weight, so if it gets kicked up into any powerfilters you may have, it could mess up the impeller.