...and a good question at that.
Last summer was the first summer for this new pond. It was about 2/3 full. The entire perimeter had weed growth out to about 4' deep; mostly american pond weed. There is a fairly large, elongated underwater island that was at about 3-1/2' deep that also had notable weed growth. I am uncertain as to the balance of the pond that is over 4' deep.
We are going into this, the second year, full to the brim. Now, those areas of 3-4' deep with weeds are at 7 - 8 feet deep. I am unsure if they will continue to grow from those depths...? I assume alot of that has to do with water clarity. The new wild card will be the 1/4 ac or so in a shallow zone where the nesting boxes are located. It is now completely covered with water over an area of much lesser depth and bottom slope than the rest of the pond.
Anyway, given all this, I think I am at a wait-and-see point in development. I compound this thought process with the idea that the FH and cray forage base will need a little extra protection to survive and/or multiply.
Unless the experts tell me otherwise, I want to see how this year plays out before I make the GC commitment.