On the other hand, if you will go with replacing with Epsom salt, it will set you back about 25% to 50$ of its list price. https://www.bs-wiki.de/bi-luene-moorfeld.de/mediawiki/index.php?title=Strategies_To_Reconditioning_Lead_Acid_Batteries_With_Epsom_Salt_That_Just_A_Few_Learn_About