Algae in the aquariumAlgae prevention in your planted tank INTRODUCTION Go to the author page to see more books. (click on Follow to not miss book discounts and new books, I have many promotions every day !)All my guides are taken from the veterinary university where I work as teacherAs always, my Ebook has photos And links, so you can order products online.Therefore, buying a printed version, Kindle version will be free for you! I wish you a strong fish family and a pleasant time with them.