My Tomini tang has just gone through a month of copper power between 2.2 and 2.5ppm and then two rounds of Praziquantel treatments. I decided it was time to move it over to the DT today, and noticed this wound on the left side. I'm pretty sure that wasn't there a couple of days ago. Is it just an injury, or something more serious? It also seems to have lightened in color a lot in the last few days.