Alot of people say no. Believe it could contain polution "oil" if you buy dead sand it's only 20 bucks a 20# bag or less or southdown highly recomended 6 bucks 50# thats what i used on bottom argonite on top seed with a little live suggested best. But it is youre tank so youre choice i would probaly boil first. I do things against recomandations i feel it's a science project but i do'nt have all sorts of exspensive corals. <img src="graemlins//eek.gif" border="0" alt="[eek]" />