Do you know how old the Miracle Mud is? I had some that I put in an old bucket and it sat for months (it was winter and getting rid of mud in the winter is difficult here) When spring hit, I pulled the bucket out to clean it and noticed the water smelled fresh. I ran water tests and all my parameters were good. Instead of throwing it out, I replenished it (got a small jar and added it, then stirred it up real good) and it is now doing great in my 'fuge. I would keep it if it isn't smelling and looks ok.
C