Reading the info in the picture, it is diatomaceous earth, a natural silica substance that is used as a medium in hydroponic gardening and recommended by many as a soil amendment in terrestrial gardening. I see no harm in trying, but I'd start with "extra" lilies and maybe use it as an amendment and not the only medium.
Truth is not what you want it to be; it is what it is. And you must bend to its power or live a lie.”― Miyamoto Musashi
"Knowledge speaks, but wisdom listens." ~ Jimi Hendrix
“The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.”― Stephen Hawking
Craig