One of my dojo loaches has a small white lump on his side. I first noticed it when I brought him home two weeks ago. So far I haven't noticed any change in it, and he has been swimming, eating, and playing like a normal loach (I've kept loaches for over a year now).
I've tried figuring it out on my own but I'm at a loss. I know it's not Ich. I might think it were a fungus but it's not fuzzy. He's in a 20G tank, 72F.
Any ideas?
Thanks!