". Much like aquaponics—in which fish farming and hydroponic gardening are combined for a mutually beneficial relationship—duckponics feeds plants growing in gravel beds with...Read the full story on TreeHugger ". Much like aquaponics—in which fish farming and hydroponic gardening are combined for a mutually beneficial relationship—duckponics feeds plants growing in gravel beds with...Read the full story on TreeHugger