>>Here's a new product from Dupla that uses barley straw to control Algae.http://www.dupla.com/New_e.htm Scroll down to the product. Don M.<< There is also a barley Extract called Flora APM made by Aquarium Landscapes/Fishvet, and another product advertised here on ACTWIN where you put straw in your filter, called ALGONE Robert Paul Hudson http://www.aquabotanic.com