Begin new illness thread... I noticed today that my dwarf gourami has a deep lesion on his head above his eyes. It kind of looks like hole-in-the-head to me, but I'm not very familiar with all flavors of freshwater illness yet, so not sure. He's acting healthy and eating. Tank params are NH3=0, NO2=0, NO3=15-25. He's in a 20g long with 7 zebra danios, 6 julii cories, and a few odd mystery snails. I've had him 4 months now. Here are some pics. Can someone please help me confirm a diagnosis and suggest a treatment??? Thanks!