Duckponics modification

I don't have any great pics of my set up but I have a duck pond- cement and in need of some repair. I built a bio filter area higher up. I had been flooding the biofilter and growing pond plants. The problem is the fence around it wasn't great and the ducks were really determined to get in there and eat the plants, which they did, lots. So now I'm thinking I want to fill the bio filter with sand and rock and plant fruit/veg in it. I also have a berm for wind blockage of the pond that I could plant onto. So what plants do you think would do ok with high amounts of nitrogen and wouldn't be too appetizing to birds.

There are these cheap greenhouses at lowes right now. $44. I was thinking I might get a few and perhaps put them over the bio filter. That would take away the browse possibility. I think the water and the rocks would keep the greenhouse pretty warm year round. Maybe I'd be able to keep the pond open permanently then. That would be exciting!

I'd also like to know if ya'll think I could fill some of the cracks in the cement with simple caulk??

Danielle, I don't have any answers for you, but I would love to see pictures of your setup if possible. My wife has been working on a duckponics system and I bet she'd love to see what you're doing!

I took a lot of pictures of the duck part of it but not a whole lot of the bio filter. I kill myself! But I can share a few.

What isn't shown in these pictures is the final result with the pond all full and the berm in place. So I did do a berm that is 1-2 feet high around the biofilter with the extra dirt. I also has the pump in the bottom of the duck pond pumping up to a planter that I had holes drilled in. The water cascaded through 3 planters before entering the biofilter. This way I was able to keep some of the smaller plants in the planters without them washing over to the duck side and being eaten. Plus I had an algae scraper in one of the pots.

I suggest hydrolic cement to repair those cracks.