They probably aren't eating too much because of the stress from the move. You can try to cover 3 walls of their tank to help make them feel more secure. You have to get the heat up that's probably why they aren't moving around as much. Like Elliot said, 75 degrees minimum. Maybe a dome light fixture with a low watt red heat light? Because your tank isn't tall you want to be careful that what you use doesn't burn your frogs.