Thank you for getting back to me. There are two likely reasons for your turtle's behavior. One is that she is gravid, and wants to find a place to lay eggs. Females do lay eggs (infertile ones) even if no male is present. A female will become very restless as she wants to find just the right place. If a female doesn't find just the place she wants, she'll retain her eggs, and that can be life-threatening. Symptoms of a problem may include not laying eggs, laying only a few eggs, lethargy, pacing, lack of appetite, prolapse, digging motions, and kicking of the back legs. If it seems she wants to lay eggs, you'll need to provide her with a nesting site. The following site has some ideas and photos:http://www.aboxturtle.com/box_turtle_egg_laying.htm
The other possibility is that she is simply restless and feels too confined. Box turtles need a large enclosure. Aquariums often don't make the best environment. A 50 gallon Rubbermaid tote allows better air circulation, though it's not very pretty. The best way to keep box turtles is in a pen outdoors, but of course,with the predator problems, that won't be possible right now. I'll give you a link in a moment with more detailed information on housing.
If the turtle is to be kept inside permanently, it's extremely important that she have a UVB light. Without it, turtles develop a painful condition called Metabolic Bone Disease, that results in a slow death. Box turtles also require high humidity. The turtle will need a basking light, and the area directly under it should be kept at 87* to 90*F. These sites have reliable information on care:
Even though your turtle can't live outdoors, it may help if you can take her out every day for some supervised time. If she exhibits signs that she needs to lay eggs, but doesn't do so, it would be best to have her examined by a reptile vet. If you have more questions, just let me know by clicking on REPLY.