I am experimenting with growing duckweed in containers in the house to feed my chickens in winter. Duckweed thrives on nitrogen, and I am starting to think that instead of adding fertilizer, it might be fun to add feeder fish, like guppies or something, so the fish poo can be the nitrogen source. Then I could feed my birds the extra fish and the duckweed this winter for protein and greens. I want the feeder fish project to be easy if I do it, like raising meal worms or compost worms is easy. I don't want to have to spend a lot of time or $ for equipment. Anyone try anything like this crazy scheme?