Posted: Wed Nov 14, 2007 8:24 pm
Are you saying you just have a UVB light for them? If you are, and unless you have a mercury vapor light, (which would be for a larger, say 50-gallon tank), if the light is a UVB light, it would be flourescent and wouldn't be giving off enough heat to make the basking area 90F. If the basking light is giving off heat and isn't a flourescent, it's not a regular UVB light.
Did you recently get them? Is it getting colder where you are? If so, I'd definitely boost the temp up to around 78F. Do you have a submersible water heater for them?
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-