I ask because I have had ~180 gallons of sap in my storage tanks for a couple of weeks now. During that time I have had lots of new sap arrive (in 3 tanks it enters from the bottom, 1 it enters from the top, all are drawn equally from the bottom). I've made 46.5L of syrup, so I've consumed a lot of sap. I have been assuming nothing bad is happening to my sap in storage.