Space is a limiting factor, to a certain extent, but I do have the capability of adding a second similarly sized pond if this one works. That way I could put 8 gpm in each pond and be able to grow more fish. The reason I can't make the current one much bigger is because the width is confined by the width of the draw, and the length is confined by the downward slope towards my Dad's pond. If it's too long then I have to move literally tons more dirt to get the even perimeter.
Yes, hopefully Cecil jumps in here with some numbers on what he thinks is a good turnover rate.
