DO not distinguish humic and fulvic so much!
Humic acid as many of you know is organic matter in a stage of decomposition not yet to crude oil. Currently the major source of humic products is leonardite which is mined out of the ground and is very high in humates. Fulvic acid is not officially recognized by agricultural authorities as it is more or less a purification of humic acid. There are two methods of refinement that I know of; that is chemical and cold processed. Chemical treatment involves phosphoric acid cleaning the humate source resulting in the gold liquid we know as fulvic. Many view that this method is the cheaper and less efficient in preserving he beneficial qualities of the humate source.
There is one product I know of that is made from a cold microbe based process and that is Ful-Power by Bioag. The humate source is cleaned by way of bacteria resulting a clear liquid that has no similarity in appearance to dark, black humic acid products. This inmy experience is the best product to use in a hydroponic environment. It brings the natural chelating effects, trace minerals, and latent energies to your hydro!