this is super helpful-thanks! I've actually never considered shrimp so I'll look into that. And I may have a potential location for crayfish as well, which sounds super enjoyable. I don't feed or aerate, and unfortunately the pond catchment is about 50 acres of pasture. Good news is there are usually only 3-5 cows/year in this area and it's a very gradual inlet. So I'm hoping to plant enough bank plants in that area to filter out some of the nutrient load. Thanks for the info!