domestic ponds - beautiful way of re-using water

I like this! It is not only beautiful, but also very practical:

"aquaponic agriculture allowing the symbiosis of fish and plants. the plants are nourished by the fish water, full of nitrate-rich waste. the plants therefore play the role
of natural filter by retaining the nitrates and assist in maintaining balanced water for the fish."

domestic ponds by mathieu lehanneur, benjamin graindorge + eric jourdan via designboom: