Here is a great way to make use of back yards pools. Many times you will hear people wondering how to get rid of their old in-ground pool. Instead of getting rid of it, take advantage of the structure to feed your family, or perhaps start an urban farm.
The use of home aquaponics has really been taking off among the urban homesteaders / backyard farmers over the last few years. Great to see all of the innovative ideas that people are coming up with. For more information, check out sources such as Aquaponics Source, where they have a blogs on how to build your own system along with inspirational stories from around the world.