Epsom Salts is not a "salt". It does not change the pH. Epsom Salt crystals looks like salt and that is the only thing that equates Epsom Salts to Salt and alkalinity.
from
http://www.saltworks.us/salt_i...
"What is Epsom salt?
Epsom Salt
Epsom salt, named for a bitter saline spring at Epsom in Surrey, England, is not actually salt but a naturally occurring pure mineral compound of magnesium and sulfate.
What Is Salt?
Common salt, or sodium chloride, is the chemical compound NaCl. Salt occurs naturally in many parts of the world as the mineral halite and as mixed evaporites in salt lakes. "
Epsom Salt is: magnesium sulfate
Common Salt is: sodium chloride
