First, I have been feeding them pellets, and occasionally dried mini shrimp or krill as a treat. I have tried feeding them kale, banana and apple, they did not seem interested in any so I haven't tried fruits or vegetables again, but I would like to try giving them lettuce or some sort of aquatic plant as I know that is good for them. Is it okay to feed them only pellets? How many times a day and how much should I be feeding them? Is it worth it to buy guppies or other small fish for them to eat?
Second, for the most part the turtles get a long, but lately I have been noticing the male turtle swimming up to the female and slowing moving his head in to bite her face. She swims away and he usually doesn't follow, but I am wondering why he would do this and if it is something to worry about. It is never when food is around, it is just at random times.
Third, the female is definitely more calm than the male, she is much less nervous to be handled and she swims around but is less neurotic than the male in the tank. He will swim against the glass as fast as he can and he is much more nervous to be handled, just tries to burrow into somewhere dark. Is it abnormal that he swims against/along the glass very quickly? Also, this may be a silly question but it's normal for them to lean upright against the rock in their tank and sleep right?
Fourth (sorry for so many questions), I have a lamp that holds a red heat bulb and a fluorescent bulb (that gives them their UV needs right?), I have been turning both bulbs off at night, is that okay? I figured it was, but I want to make sure that they don't need the heat bulb on over night. They are kept inside and have a water heater (although I think I need to get a bigger one).
Sorry for all the questions, some of them may be silly but I have been wondering and I just want to make sure my turtles are happy and healthy! Thanks so much.

