Hey guys! I am building a turtle pond this summer, and I have been looking at pond liners. I found one that is 10 foot by 15 foot, and I was wondering if anyone could tell me how deep it should be? I will have my turtles outside year-round. If I'm not mistaken, it needs to be about 3 foot deep in Kentucky. Could anyone tell me what the dimensions of the pond should be so I know how to dig it? Thanks!!