Ms. Bernstein started her own business called the Aquaponics Source. She has a YouTube channel, teaches aquaponics at the Denver Botanic Gardens and recently published a book.

Aquaponics farmer James Godsil says the Internet is helping many aquaponic gardeners connect and learn from one another. Three years ago, Mr. Godsil helped create an aquaponics farm in Milwaukee, Wisconsin, called Sweet Water Organics. In twenty-ten, he helped establish a foundation.

JAMES GODSIL: "The Sweet Water Foundation was dedicated to democratizing and globalizing the information and the methodologies required to advance this very Earth-friendly food production system, which, by the way, only uses about ten percent of the water normal farming does, and uses no pesticides. It's all natural."

Mr. Godsil is traveling to other countries to teach aquaponics.

JAMES GODSIL: "I was asked to go to Venezuela this March. And I'm working with people who have a project in Ecuador. I'm working with people in the Congo and Uganda and Tanzania."

Subra Mukherjee is with a group in Kolkata, India, called the Society for Appropriate Rural Technology for Sustainability. The group is working with the foundation to develop aquaponics in a community in West Bengal with poor soil conditions for growing food.

SUBRA MUKHERJEE: "So I believe technologies like aquaponics are ideal for these kinds of situations. We can actually bring it right into the middle of slums in the cities. So it becomes a very good model for urban and village-based communities."