un-expectable , but I am sure they will make it right - they are a good company, one of my favorites, I ordered for dogs (great prices on heartworm med), birds (parrots) & fish from them on a regular basis for years.
You may know this already... if not, for what it's worth ... that does look like Red Sea salt.. what should have come in the black bucket, inside the black bucket it comes in a plastic bag like that, with that exact blue zip tie
Hopefully they will make it right & ship you a new one, right away.
Seems someone in management needs to straighten out the warehouse guys again.