Adam Roberts

Hi,
I have a question regarding the plants and the media used for the roots in a natural grey water filtration system, what are the best plants selection that are fast growing? can plain gravel be used as a media for the roots, is there other options?

Greetings,
I am from US Virginia, I've just joined the Forums, currently practicing gardening / composting  in my small back yard, seems like there is tons of knowledge in here. I am glad to be be part of this community and I hope to learn more from you.