| Hole in the head is generally a progressive type problem which obviously can vary in speed, but if the spot is not getting larger, or new spots appear, I would wait for any treatment for now.
It is also contagious and so watch your other fish as well. If you see more spots, or this one gets larger, then I would worry. It could be a simple wound or something along those lines. Generally, hole in the head is more apparent than just...well, a hole...and there will be oozing from the site as well. |