Last night, before the cold snap, I dumped about 350 gallons from the tank by the sugar shack. Got the RO connected while the vac pump did its thing all day. Went to the bush with the transfer pump only to find that the cold snap was more active than I thought. All 3 tanks had 6" of sap .... sitting on top of about a 150 block of frozen solid sap. Maybe it will thaw tomorrow.