Sorry, I forgot to write ammonia level. It was at 0.3, which was in the green zone of the chart that I refer to.(I am using the Nutrafin test kit)
I did a partial water change this afternoon.
I also noticed that all my other fish are fine.
The poor black phantom one is just floating around in...
Hi,
I have a 10 gallon tank with 6 Black phantom tetras, and 2 penguin tetras. I got them 3 days ago. The problem is that one of the small penguin tetra keeps nipping on one of the black phantom. He almost nipped his tail fin completely, and I am afraid that he kills him. He keeps following him...