Let us know how they work out.
Since Toby posted his experience with them I have started to look into these organic acids, also a post on a UK discus group piqued my curiosity (it obviously said that his product was the best in the world and all the rest is rubbish). My slight concern is that these substances are often extracted from Leonardite, that is a poor quality coal. Besides the still debated method to best measure the actual concentration of these acids, I have some concern about the possible content of heavy metals and other residues. I would like to see an analysis of what the extracts actually contain