How can I get my Cynops Orientalis to eat?

I bought three of these Chinese firebelly newts five days ago, and they haven't eaten since. I have a 10 gallon tank with ample water space, a floating dock, good filtration, and tons of hiding places. I've tried to feed them bloodworms, live mealworms, brine shrimp, and plankton, but it's all a no-go. Also, two of these three newts are absolutely terrified of the water and will do anything to get back on the turtle dock. I do not wish to spend more money to build a terrestrial setup. Besides, I thought they were mostly aquatic. Please help!! Thanks!