I noticed when I first got it there was a blackish spot with brown edges on part of its shell that looks like he may have been physically damaged...the spot hasn't changed in the past 2 weeks, but I wanted to make sure it isn't something I need to worry about. It doesn't really look like other pictures i've seen of fungi or shell rot but i'm still concerned...
I've got it in a 20 gallon long tank with a 13 watt reptiglo 5.0 flourescent and an incandescent over the spot where he likes to bask. It's eating like a champ, loves to bask and seems to be healthy otherwise. Here are some pictures where you can see the spot a little better:
If anyone can tell what this looks like and if this is a problem that I should address it would be greatly appreciated. Also, if anyone has any tips on how to judge their age/sex that would be great too..I'm having trouble coming up with a name as i don't know if it's a male or female...





