I picked-up a 100lbs of Southdown sand from a local reefer that moved out of town. I put it in a rubbermaid container when I got home. I added about an inch of my tank water to cover it and added an air stone. The sand looked fine after it settled had a few spaghetti worms to surface on the top. The sand was inside in the container for 12 days. I started to scoop the sand out to put in a new set-up and the smell hit me after a few scoops. That smell you get from live rock thats not fully cured. I know it's from die off but do you think that it will be ok to use?