My wife has in her planted tanks this black hard to get rid of algea that grows on the plants and ornaments. Can anybody tell me what it is and how to combat it. I know in SW excessive nutrients cause algea to grow but from what I understand these excessive nutrients are needed in planted tanks. The LFS called it beard algea. Recommended some type of shrimp to get rid of it. I`m not much of a fan on getting livestock to take care of problems in the tank. Any solutions?