I had been using a blend of 5 cups mag chloride plus 3 cp mg sulfate. The mag chloride originally used was a hexahydrate. I recently acquired some mg chloride anhydrous and was wondering about the pros and cons of each? Should the anhydrous also be 5 cups? Heard the anhydrous has less water hence less should be used? Also is there a concern about the excess heat produced when mixing? Thanks in advance