I have several of those I use for a variety of different locations...
Wow... Fancy... Now...
Take it a step further and use a couple of hundred gallon stock tanks and put tilapia in them and you've got an aquaponics system that you can grow veggies above too. ;-)
i'm considering something like that to do fodder/sprouts over the winter maybe. I already have the indoor pond, complete with guppies. I would just need to build a rack to hold the fodder trays and a timer to run a pump for watering them.
Do you think the fish would carry any pathogens that would bother the chickens? I've often wondered this as I have a rain barrel set up with fish. I've heard that trout work better in northern climates. I would LOVE to have a nice sized green house with an aquaponic system to augment poultry. Think how an active system like that would affect the grocery bill!
my chickens often sneeze when chowing dry feed.
comet goldfish work better for smaller tanks, as long as they don't freeze solid. as long as there's liquid the fish will live. trout grow much too large to keep in standard stock tanks, and they would need more food than local bugs would supply (you'd have to feed them) in the summer.
my indoor pond is roughly 150 gallons (when full), planted with true aquatics and hasn't had a filter on it in 10 years.
in a normal aquarium, there's a 2-step biological process using beneficial bacteria to convert waste to nitrates and then nitrites, which are removed by regular water changes. aquatic plants utilize all forms of nitrogen as the primary 'fertilizer' for green growth.
in my pond, I don't do water changes, but I do use it as my water 'bucket' for all the birds in the house (chicks, macaw, hospital) and the dog too, and simply fill it back up when it gets low.
with a truly hydroponic situation, you want a heavy fish density to provide the nitrogen for the plants. plants that would do best would be those that are primarily leafy greens. not sure how you'd supplement the phosphorus and potassium also required for flowering and fruiting. I haven't researched hydroponics much beyond the leafy greens...
saw a page on fb linked recently, i'll have to look for it again. someone detailed their plans of incorporating hydroponics with their ducks and fish for food. (tilapia).
Epcot in Florida (Disney offshoot) has a huge hydroponic system that provides all the veggies and tilapia served in the restaurants, and has for years. they've got a number of other very efficient systems to deal with things such as the huge amounts of raw sewage produced daily. that one was interesting too. raw sewage into a canal (don't remember how long, but thinking miles... ) at one end, clean water out the other and put back into the system where it began. and also harvesting TONS of water lettuce daily to use as a fuel source. again it utilizes naturally occurring bacteria to break down the waste and turn it into plant food. that may be a simplified description, but it's definitely food for thought.