Hi all,
I have a 120L fully cycled tank with the following parameters : 0 Ammonia, 0 Nitrites and 10ppm of Nitrates. In the tank, I have 5 gold barbs, 2 platys, 2 denison barbs and 2 amano shrimp.
Over the past 3 weeks or so, one of the denison barbs has become very dull and skinny. It rarely...