I just got a new tank for my birthday. Its nothing big, just a 5 gallon tank. I have four neons, a tiger barb, sucker fish, and crab in there right now. The tiger barb was full of color this morning, and when I looked at it tonight the stripes were hardly visible. I don't know what is causing this? it didn't seem as energetic as normal either. Any ideas as to why its discolored? Not sure if its a male or female
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