I'm thinking of getting an amazon sword for my 55 gallon in the place of an aponogeton I currently have. I like how it is a heavy root feeder (using root tabs) since it won't compete as much with my floating water sprite that is choking out my aponogeton and other fast-growing plants. However, I read that amazon swords need 10-12 hours of light, and I am afraid this will cause an issue with algae in the tank. Even though my water has very little nitrates (going to 5 ppm within 48 hours of using ferts) due to that water sprite, which covers over half of my 55 gallon, there is still a persistant dark green algae that grows on my plants. Do the swords really need this much light? Is there another plant similar to an amazon sword that would work better?