A terrapin has white spots and softer shell (carapace).
Channel: Dr David Sing
Date: 23/05/2015

This 15-gram terrapin is active but now has white spots on the shell. After iodine disinfection for 30-60 minutes, he is put back into the aquarium.  The owner is advised to give him more pellets and not to let him submerge in the water for most of the day.  Sunlight for half an hour. Hygiene of the tank, rocks and brushes. An antifungal cream is prescribed.