You are an engineer aren't you!
I started out with stacks of pallets for my FH's and sunk barrels and large pipes and other things they could get into. But found that when I started sinking large brush piles, including some big cedars that are so deep I never see the big ones even under extreme draw downs and keep stacking more brush on top of the 100'X100' trianangle section of my pond I designed don't swim danger brush I have had better luck on reproducing FH's. Also I have some of the brush extending above water all of the time and frogs, damsel and dragon flies love that, including my pair of pet GH's which like to perch as much as wade.
As far as catch fish I still do better off of earth struction, i.e. where channels meet underwater shoals that have drop offs that then open up to the main pond and deep water.
But I have thought about making one those condo things. But it will be next year before I could get to it.
Can't wait to see a picture of it full.
