"That's why I was asking about the magnesium. In the old PMDD recipe, there was a whopping dose of epsom salts." There is a new one? What was wrong with the old one shown here: http://www.hydroponics.com/info/aquatics/pmdd.htm Thanks _______________________________________________ Aquatic-Plants mailing list Aquatic-Plants at actwin_com http://www.actwin.com/mailman/listinfo/aquatic-plants