Will an aquatic turtle about 6in survive in an outside pond with other turtles Will it adapt well?

yes definatley thatis a adultsize 6 - 8 female 9 - 13 yes bcuz most aquatic turtles or of sexually majurity at 4ich carapace which is around to years old would not recomend any smaller than 4 as it would strugle during feeding an some species of turtle prey on hatchlings