OK,   just as a warning, I  don't know that you will be able to do tilipa in the winter. I guess it depends on what kind.   We had to move ours inside over the winter. ( yes, we had a trash can of fish in the bathroom in January and February, was a talking point for guests, lol) They are not in the ground, but  they don't like cold cold, and it was getting too low for them to grow. And if they don't grow they don't poop, and  the cycle goes downward. Our tilipia also do not like chicken poo  so we had to feed em anyway. they DO like duckweed and  watercress roots and algae, however, so  that helps.  
 
We  have a black fish tank outside where it gets about 6 hrs of sun ( most we can get around here we are on a hill)  and  use flood trays and pipes for our plants.  They grow great, the watercress has gone INSANE. We don't have perfect  sun however, so its not a jungle down there. We are trying to add a greenhouse this year  with  shrimp, chickens and  peppers, but its not built yet, so we will see what happens. 
 
This will be our second year with aquaponics.  Mario Is really into it and likes the whole bio-dynamic system aspect.  we could not get the water up to 80 last year long enough for them to breed however, and they grew slooowly.  This year we are going to heat it for long enough to get fry and see what happens. They are  eating better and growing more  already so we are doing something right! we have a local aquaponics expert  around here Mario is friends with who  he has been training with. I call him crazy fish guy.  he  has been having people from all over the country come down to learn from him. He  is on the  state board that is trying to redo all the fish regulations in California  since they make no sense, so hopefully it  will be less illegal to keep some of the fish that are good for this stuff. ( there is a fish that is both on the state recommended for hobbyist AND illegal list.. how do you do that??)
 
Its exciting to see more people putting systems together!