Sandy Barnett, author of this article, helped me with the dietary section of my new book and much of it is repeated there, but some things I have fine tuned because of my experiences with my own turtles and in helping many other keepers. I like to mimic the natural feeding habits of slow moving reptiles which is to forage for food, then hide and rest until they are hungry again. I think turtles should have time to digest their food and a one day interval may be too short. The paragraph below is in my book: (You can buy an autographed copy from my website, www.boxturtlesite.info)
Feeding frequency
Factors such as age, health condition and the time of year should determine how often to feed captive turtles. Hatchlings and young turtles can be fed every other day. Healthy adult turtles can generally be fed every third day (more often if they are underweight). Overfeeding can lead to certain dietary problems. When excess food is available, some turtles may begin to selectively eat only favorite foods, and actually lose nutrition in the process. On the other hand, ravenous eaters may develop excessive weight gain. After several months of preparing meals, you’ll begin to learn the appropriate amount of food for your turtle. Adjust portion sizes so that only a small amount of food remains after the turtle finishes eating.
Hope this, along with Sandy's excellent article helps you decide what is best for your turtles 