The thing with this is it didn't happen until a day after transfer #3 which was to just plain tank water. If it was a reaction to the PraziPro wouldn't this have shown up during the two transfers when the PraziPro was added to the QT?
Not necessarily. There are many types of allergic reactions ranging from immediate acute life threatening to reactions that take days to develop. In kids you can get an allergic reaction with the first dose or after 10 doses. You can also see an allergic reaction after the medication has been discontinued In general local types of allergic reactions tend to take about 48 hours to truely mature. It is called a delayed type hypersensitivity.
I find this very interesting