Yeah, it literaly looked like a black hairy sword rather than an amazon sword. Everything else is fine, just a few little spots with some hair algae, but it's slowly going away. I'm trying a split photo-period on this tank. It worked for me when I did my first low tech tank, so I'm hoping it'll help me here. I'm running the lights 4 on, 4 off, 4 on, 12 off.