Admittedly I do not like the EM method. While I cannot deny that it
works quite well to use those microorganisms, I do not like the
dependency. When I met with some EM promoters a few years back, I had
to realize that tehy claim a) that it is very difficult to make the
brew year after year without it deterioratin in quality (different to
yoghurt or kefir or kombucha, for example), and that it basically is a
black box product, and the fine print of how to do it, the actual
receipe is a secret. well, maybe this has changed, but back then I
decided to ignore this method.