I'm sorry I thout your tank was a 20gl but ya I love knife fish ive had several there awsome and they dont grow to awfully quick but ive seen some really large ones heres the kind I like http://bham.bluereef.zapto.org/photos/beanpoles_reef/images/507/original.aspx
Rob_Reef_Keeper Your tanks no that bad I think though its a little washed in the picture maby its the camera needs ajusting. I like 20k bulbs personally but 10ks are alright too.