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RE: Discus and Metal Halides in a planted tank

I have a 120x60x60cm planted tank w/11cm of substrate,  containing Discus.
Originally, set up w/ 4 40W fl. tubes.  Found insufficeint, and installed
two more for 6x40W fl. tubes.  Tank noticeably brighter.  Found Discus were
much more timid, so much so that they are not as much fun to have. In time
the more dominate individuals began to show themselves more often.  However,
the more submissive ones never overcame their fear of the light.