is there anyone who knows about yellow belly sliders. I have 2 hatchlings .I have had them for about a month. they are in a 10gal tank. I have uvb bulb and basking bulb. the basking temp is 90_ 95degrees. my turtles are starting to get dark necks on the top and black spots on their carapace.the basking light is a few inches above the top screen, it is a 50 watt incadascent . could they be getting too hot( like a sunburn)?also shedding skin. any ideas?