Seems like a waste. You are going to spend all that time maintaining water quality and resources feeding the fish, after already having caught them
anyway. You might as well just catch and eat them whenever you want instead of taking the extremely difficult and impractical route.
You would need filters/some way of getting oxygen into the water, large heaters in the colder months, and a bunch of other stuff. Not to mention I'm
not sure if they would like tap water much so you would probably have to filter it with something like a Brita filter first to get out the chlorine,
etc. There may be some form of purification tablet you could use though.
I'm also not even sure if it's legal. Especially if you're working with large numbers of fish. You might need some sort of permit. The neighbours
might notice all that splashing around
Anyway if you want to do it as a hobby in your spare time, you could probably pull it off. But it's a very poor choice in a survival situation I
If you're serious about it, start off with a small aquarium and one small catfish, and see if you can keep it alive for more than a month, before you
start dumping dozens of fish into a giant pool. My uncle has caught and kept sunfish in an aquarium (not for eating though), so it's possible.
Oh, and probably a lid, since most fish species love to jump, and you'd likely find 2 or 3 fish laying by the side of the pool every morning.
I can also think of several species I would rather have than catfish, if I was going to all that work. Pickeral ("Walleye") and trout would be a
good pool-sized fish. You may even be able to keep a few salmon alive in there. (But not salmon and anything else or it would likely eat them.)
In a survival situation, there are lots of different types of fish traps you can construct. I probably wouldn't farm them though.
If you want to farm something to eat, why don't you get a pet pig, duck, chicken, or a similar small land animal? That way you don't even have to
worry about the water element.
[edit on 24-4-2007 by Yarcofin]