Aptus does seem to be the only company selling this retail in the US. agro-solutions has the same thing as facilitor, execpt it has a little copper and zinc added. They have a California office, but they only deal with commercial ag. Wouldnt even give me a distributors name. lol. Here is a good article about the benefits of silica I found on agro solultions website. This seems to be common knowledge in commercial ag. Anybody else try to find another source?