Interesting point... I could do that though.. we are just going to do 6’x12’ (2”x12”x12’)square with a divider for each right now by the house to cover us for playtime and the will be primarily inside anyways. But I want turtle haven when we build for good. I am going to allow at least 1 acre devoted to just them.If you want include the lake , you better fence it . Tortoise CAN swim away