I had approximately 500 gallons of HFCS which began to sugar in a 1000 gallon tank. Once we were able to punch a hole through the crystal syrup and get liquid flow, we had to circulate the syrup daily for 5 to 10 minutes. This seemed to at least give us an the opening until we could start pumping it off for feeding. Once we got down to only the crystal syrup stuck on the bottom and the sides, we would add hot water to the tank and let it set for 24 to 48 hours. We tested the liquid at first to determine if the mixture was "sweet" enough to feed the bees based on specific gravity (1.405 mg). We found that the mixture was close to what our mix was. My answer for prevention of crystallization in your tank is to start circulating it at first before the syrup starts crystallizing. Steve Hanlin :::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: -- Visit www.honeybeeworld.com/BEE-L for rules, FAQ and other info --- ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::