I now have a better understanding of what likely happened here.
Just because a manufacturer accepts responsibility on an issue in no way, shape, or form implies that they are guilty.....it only means they took the high road and decided it best in the hope of maintaining good will.
There are so many variables in the road between factory and fish tank that controling such aspects is nearly impossible. You tell me what is more likely:
A) that there was a bad batch out the millions of cubic feet of salt that such a manufacturer produces, or
B) something happened in the storage, mixing, transporting, etc. of said salt by the hobbyist?
Common logic, yes?
All too often manufacturers get the bad rap for something entirely not of their fault and I can all but guarantee this is one such example. Knowing Mr. Kohler's personality, he most definitely decided to apease the customer out of respect of being at our show rather than dispute the issue and create further negativity (lose-lose scenario, that one)
again, my take on this is a well-deserved Kudos to Redsea for going the extra mile for this customer and making things right, regardless of who is/was at fault. I don't think anyone should be concerned about using Redsea Pro, as long as they follow the instructions of the product.