Backyard Aquaponics
A place to discuss aquaponics

So, in Sri Lanka current building an 8'x4'x2.5' pond for tilapia, I have rabbit and chickens and I have seen people just allowing the poop into the pond then pumped out to a natural filtration.

I want to have a 50-gallon drum rather than throwing poop into the pond to throwthe poop directly into the drum, then pump out to an aquaponic system then it flows to natural filtration before hitting the pond to be recycled back again. What problems do you see in this kind of setup?

Welcome to the forum

Welcome, so in essence it is hydroponics/rabbachickaponic. Whereby nutrients are manually added to the water?

Yes, that is correct!
As good a description as any!

I guess the main thing I'd worry about is the organisms present in the poop. Rabbits and chickens are warm blooded like humans and there is some potential for dangerous organisms to be present when you use their feces. There are studies on green pond culture using manures from livestock to grow tilapia. Probably be a good idea to look these over. I don't think most fecal organisms last long in a AP setup but I could be wrong - either way if you decide to do this use common sense and clean the produce with good clean water.

Other than that the presence of antibiotics in the feed could potentially be a problem for the bacteria in the system.

Both of these seem like pretty remote possibilities but I can't rule them out and you should proceed with caution. I'm not an expert on either of these so take this advice with a grain of salt.

I would concure with scotty's concerns above.

As a minimum I personally would age the manure water in another smaller system with an areator and/or airlift pump. Even considering growing reeds or the like, to sweeten the water and kill off potentially dangerious pathogens. One advantage of this proposal could be allowing habitat for all other marco invertebrates in the absence of fish, these organisms are far better at dealing with detritus, and with enough water flow (minimal) i have personally found little problem with mosquitos. Let us know further in a members thread with photos! Photos are gold star material