Yes, Epsom salts is Magnesium sulphate, and it does have the potential to lower the pH, but I think you'd have to use way too much of it to neutralize my pH 8.5 well water, irrigating half my garden.
I have a half gallon of my well water sitting on the kitchen counter, so maybe I will experiment and see how much Epsom salts I have to add to it to get it down to a pH of 7.
Good thought! Thank Susan.
