Elaine: Wow! That is some very interesting information and I will go back and read Ray Barkalow's findings later. I don't remember what I paid for the little bottle I bought at Wal-Mart a few years ago but I still have it ... I was mixing a few drops in a 5 gal bucket of water with fertilizer for awhile. My little bottles cap is so rusted I might not be able to get it open to use it again. I'm really, really bad about feedng my plants so SuperThrive and regular fertilizer don't get used often.
