If you are unsure what to feed your turtle ask the individual from whom you purchased the turtle. You do not want to drastically change their diet. Calcium is a need that must be met in the turtle s diet. It is needed for their growing shell. In order to obtain calcium in their diet, you must feed them food such as snails or small fish.
Some individuals prefer to add calcium to their diet by sprinkling it on as an additive.
There are many commercial reptile calcium supplements that you can add to any diet. Calcium is not enough, vitamin D is also needed in the diet. Vitamin D prevents the softening of the shell. Some individuals avoid adding an additional supplement of vitamin D, because too many vitamins can cause serious health problems. It is wise to discuss the supplements with your veterinarian.