How to Make Ferrous Sulfate Acid for Spirulina Cultivation Published on December 13, 2016 by Ditsa Keren [icegram campaigns="3945"][icegram campaigns="3945"] « Previous Ditsa Keren Ditsa Keren is a web content writer and editor, with a passion for science and nature. She is inspired by the little wonders that nature provides and strives to study them to the finest of detail. View all posts by Ditsa Keren