
Just behind his Top*dorsal* fin, and I can't believe I'm saying this, appears to me that there's a chunk of his olive skin missing....it is also very white where there's no skin. I can't begin to imagine what it is or how to treat it, so I was hoping someone on here could help.
Water parameters are all normal save for the water being hard, and the PH a little low(6.5). I do clean the filter and tank on a regular basis.
I've owned loaches before, but I've NEVER seen anything like this. In fact, NONE of my loaches have ever been sick. Also, if this is an infection/disease, is it contagious to other fish?
Much Thanks,
Jesse