Live sand is in a bag for howlong,, and it is still good.If it were me I would lower the salinity 1.010 and get the hitchhikers that you do not want out,and thin put it in your tank. raising the salinity works as well little more expensive though. My only concern is why did he get out, could it be a copper problem if so it well still be in the sand,I don't know how long ich well live without a host but that is a concern,thought.