Join Date: Jul 2010
Location: Outside Philadelphia, PA
I've never done that in a sump, but I have often used it in the main tank when I had an algae problem. Some claim that it puts out chemicals that inhibit algae growth. I'm kind of sceptical about that. That and similar plants were mentioned for such a purpose during the initial setup phase of a planted tank in the book The Optimum Aquarium. I believe the book is out of print, but is available used on Amazon. It is rather obsolete by today's standards, and to some extent was almost a product for the old Dupla products, since the author's owned Dupla. Oddly enough, the price ranges from pennies (4 to 6 cents) to almost $200.