> HFCS in a warm place does, and HMF can form quickly. > > After killing a couple hundred nucs by feeding HFCS that was stored for 2 > years in drums at 70 deg, I can confirm that Randy. Not a pretty sight. FWIW, some time back, I sent some samples of a tank of HFCS I bought in 2002 to a noted researcher who has researched HFCS and its suitability for bees over the past decade. This syrup was diluted with ~10% sterile (municipal) water at the time of delivery and has been sitting in the sun, the heat and the winter cold since then. At one time, the syrup was in a 1000 gallon poly tank and a few years back, I stirred the syrup up and pumped it into the current 600-gallon poly tank. Here is the report: "I had a look at your syrup samples and their did appear to be a stratification through the tank. Interesting because in another sample I just did ... no such stratification was found. It smelled and looked like there was some fermentation at the top. I did not measure alcohol but the sugar content was 51% at the top, 61% in the middle ... and 64% at the bottom. "In terms of "other parameters", the top was probably equivalent to the worst samples of off-spec syrup I have ever tested, the middle was also in what I would call the off-spec range and the bottom was not bad -- the bottom (which had a lot of granulation in the sample you provided) would probably be ok as a spring feed but I would not use it in winter. (From my diary page http://www.honeybeeworld.com/diary/2010/diary062010.htm) *********************************************** The BEE-L mailing list is powered by L-Soft's renowned LISTSERV(R) list management software. For more information, go to: http://www.lsoft.com/LISTSERV-powered.html Guidelines for posting to BEE-L can be found at: http://honeybeeworld.com/bee-l/guidelines.htm