Ron Smeets;2859698; said:Hi, I would recommend a "dark" background, Lightning in the front and the top covered in the back so that no direct light is in the back. My aquarium is 2,5 meter deep, half covered. This dark gives a true depth of the tank in my opinion . My 6 dats (5 > 40 cm) in this tank love the darkness when they feel stressed.
see attached link:
http://www.youtube.com/watch?v=m3IOVwBjGeM
Ron Smeets