That is very cheap. I will have to try some after what I have bought gets used up. It also looks very fine. Thanks for the link, Kyle
::Try www.bulkfoods.com for bulk powder nutrient supplement type. There are other sources for brewing beer, which are usually complex formulas of live Saccharomyes cerevisia strains mixed with other organisms such as lactobacillus, etc., but I don't think these are what is meant by Brewer's yeast in the fruit fly formulas.