Yes I have used it and it's a great remedy for both sulfur and magnesium deficiencies. The down side is that too much can lock out other nutrients. I wouldn't do a tablespoon a gallon. Start out with 1 teaspoon per gallon. You can always add more if that doens't fix it. You can't remove it though. Most of all, be patient. It can take up to a week to see signs of improvement. Best of luck my friend.
hey johnny, the mag from the salt is a definite. ur right 1 tblespoon per gallon is fine. I prefer cal-mag which is around $15.00. Worth the money, but I too have used the good ol salt method and it works. The Cal is very important as well!!!!!