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

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