I have a small Tetra that I have had for over a month in my 10 Gallon tank. After I had him for about a week, I noticed that he does not really swim anymore. He jus kind of bobs straight up and down. Actually just looks like he is just hopping. Anyone know what this is? He does seem healthy and he does manage to get some of the flake food as it passes by him.
Thanks in advance
Thanks in advance