I need help with 3 week old baby turtles

I have 2 turtles and i never see them eat. i got them the floating pellets from walmart. i don't know if they are eating and i'm not seeing it or what.. they were a gift to me and i'm trying to learn more about how to proper take care of them.also since they are just babies do they need less water in their tank i have just an inch of water now becuase when i put more water in they stay on the rock that put in there and they won't get in the water unless its shallow. also what wattage of the UV lamp do i need to have for them.since they are only babies and do i need to be giving them vitatmins or something i read somewhere about a calcium thing you put in the water and it disolves but i'm lost.please help me they are adorable but i want to do this right.oh and how do i keep down the risk of me gettin salmonela besides washing my hands after I handle them.thank you thank you, thank you!

Ok for the not eating, read this,

* Is the turtle kept warm enough? If turtles get too cool, they will stop eating.

* Does the turtle like the food you offer? Try out different foods. Some turtles can be very finicky eaters, especially in the beginning. And they have definite likes and dislikes. Most turtles will eventually take small earthworms that are wiggling in front of their nose. Start feeding favorite foods, then slowly introduce other items.

* Is your turtle exposed to too much stress? This is often a cause in new animals. Stress can be caused by handling, traveling, tank mates. New turtles will often not eat properly for several weeks. Be patient and keep trying.