If you have enough stone, build some stone "houses" with roofs. Before I came to this site and our pond had not yet filled, my family went through the basin of the pond and set up stone tepees, huts, etc. for critters to live in. When I slid a action cam down into the doorway of one of the circular huts last year, the inside was full of fingerling perch and/or fathead minnows. They loved it.
It was approx 4' in diameter, 2' high with a stone roof, doorway, and "windows".
By raising up the stones this way, it will take a long time for the muck and debris to fill in the holes.
Last edited by liquidsquid; 03/09/17 09:06 AM.