True. I was fishing yesturday a 200 acre lake. It was 94F in 5ft of water. So I think a 10ft deep spot is more than needed. Thank You for pointing that out!
I am also planning on putting in an island 20ft from shore. Then loading 25ft of shore with rocks and covering the island in rocks. (Under water not the island itself). The island will be in either the back left or right corner and I will have it 20ft out from either shoreline and have rocks going in about 2-3ft off the shoreline in 3ft of water. Since these fish love shallow areas with cover most of the pond will be shallow.
The pond will be 150L by 75W. This is .26 an acre. Then with the island it will be around .255 so almost exactly 1/4 an acre.