Posted: Wed Jan 10, 2007 1:13 pm
Welcome to the forum. Your hatchling is most likely adjusting to his new environment. I'd take out all those rocks and get him a basking area that allows him to swim under it---he may be small, but a 10-gallon tank is too, and the rocks are taking up precious swimming space.
Assuming he's healthy, a water temp of 78F is good for him and the basking area should be about 10 degrees higher (88-90F). Fake plants are good--they'll allow him to rest if he's tired swimming (how much water is in the tank?), and will give him some privacy. Does he have a UVB light in addition to a basking light (for heat--can be a regular lightbulb). A filter? Do some reading on the basic requirements for a habitat to give your turtle the best home you can.
BTW, hatchlings are attracted to foods that move, so the earthworm was a good idea (cut it up into smaller pieces if it's really big). Try some smelly foods as well--bits of tuna or sardines for example---to get him eating. Once he does eat, switch to the pellets. If you're trying to give him the regular size Reptomin, break it into halves or thirds to make it easy for him to eat.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-