I currently have a ninety gallon pond in my back yard that my two adult male red eared sliders live in. My nephew also has a adult male red eared slider that he is no longer able/willing to care for. I would like to take his turtle to add to my enviorment, however I am concerned about my two turtles not welcoming or possibly injuring the new addition. Should I be concerned or do male red eared sliders take well to each other being introduced as full grown adults.