i need some help i have a standard turtle tank 75gallon for my three turtles. i did not even know one was pregnant. i found a busted egg in the bottom of my tank. i need to know how many they can lay, what signs that she may not of have enough calcium, and any after birth things i need to know.
please someone help.

My page on turtle eggs and such is at http://www.fishpondinfo.com/turtles/turbreed.htm

What kind of turtle do you have? Most aquatic turtles lay about 6-12 eggs at one time. If she didn't have a lot of calcium, the egg shell will be very thin. Turtle egg shells aren't that thick to begin with (unlike bird eggs). Just continue to feed her well. If she seems ok, there is no special care that she needs. She may still have eggs inside of her. While a normal clutch in the wild might be more than a dozen eggs, often in captivity, a turtle will dump just a few eggs.