He is in a 10 gal. tank with 5 other tiger barbs
Water stats.
-pH = 7.0
-Ammonia = 0
-Nitrites = 0
-Nitrates = 20
He doesn't show any signs of being sick except for the discoloring. He swims around no problems, doesn't hide, not rubbing up against anything, no signs of trouble breathing, eats...