So, I've an idea. Getting out little farm going, we're interested in raising some fish, tilapia to be exact. I thought we could have a couple 800 gal stock tanks, almost completely in ground, with tilapia in them, and have a bunch of ducks as well. The ducks would provide the necessaries for algae to grow, thus feeding the tilapia, naturally. There would be a aerator/pump to circulate the water as well, and I was thinking of having something like a bilge pump set up, for draining the tank either partly or completely, as needed, for irrigation into the garden, also providing natural fertilizer. Have any of yall done anything like this with your ducks before? We were thinking of getting Silver Appleyards, Welsh Harlequins, or Indian Runners. Thoughts?