Well, The White Tips could be anything: Shell Rot/Shedding/Maybe part Albino.
But for the Eating, I feed my 2yr old 6-7 Goldfish a week, and any worms I find outside. She never really eats all the fish, But is a FAT TURTLE. I mean, this littel guy must have a eating disorder. He might eat 2-4 fish a week and his Fat puffs him up. The rest of the fish go to my Praying Mantis's.
If you think my way of feeding is wrong, then think of this: The FIRST time I had a little Snapper, I listened to the people here... and it died after 3 1/2 months. After that I just said screw it and fed the thing like it wants. She and 4 others are fine and getting very old.
-Its not like I dont take care of my pets, But i see NO NEED, to waste money and time on something that is Wild. My praying mantids are always loose around my house and I frequently let my Iguana's run around too.... They get what they get.