Unsealed stone and concrete surfaces will also be harmed by dissolved Epsom salt splashed or dripped outdoors the tank, mainly because of the dried salt recrystallizing and opening up cracks and fissures. Epsom salt will not be corrosive in the way in which sodium chloride (table salt) is but chlorine https://dftsocial.com/story19427885/fascination-about-how-to-isolate-tanks