FWIW, I haven't cracked a pail from the salt that came from the Canadian Distributor, I just finished my last pail from Amazon, so these would be different batches.  I have a pail of Probiotic for my own tank from the Canadian Distributor that I'll be using as soon as I do a waterchange.  I am also doing a new tank install on Friday and I'll be using a pail of Reef Salt also from the Canadian Distributor for that.  I'll let you know how that goes!  
  
Pat, where did you get your salt?  Amazon or a Canadian retailer?  What is the batch number and date of manufacture of your salt?  You'll find this info on the "Quality Certificate" in the pail.