air/water ratio
Lately George has been acting so weird. She is sometimes startled by my presence, like she was when she first came home 5 months ago. She just seemed generally agitated and skittish. I open up her tank lid to let some air in (rested it atop the tank, perpendicular), moved her basking spot so it's still beneath the lights (I don't know if they are UVB; they came with the tank), and raised the water level. She seemed to like that. Was she not getting enough oxygen?? She's so ready for a larger than 10 gallon tank -- already!