Posted: Wed Jan 25, 2006 7:47 pm
If "swirly," the UVB light is an ESU. This light does produce about 3% UVB rays and needs to be positioned fairly close to your turtle (6-8 inches) and definitely needs to be replaced in 6 months. A Reptisun would have a higher UVB output, and if you buy on-line, they cost about the same as the ESU.
I'm still unclear--is this shell rot or fungus we're talking about? Can you post a pic of the shell dry? For either, keeping the water clean, and providing a good basking area with correct lighting (the heat and UVB lights) would help, as would a good, balanced diet.
If you're unsure what the shell problem is, and especially since you said the shell is really bad now, it really would be best to take your turtle to a herp vet. If it is shell rot, it can be bacterial or fungal, and a vet could determine which and prescribe proper treatment.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-