Received my PS234 today and tested:
FC 4.5
CC 1
TC 5.5
pH between 7.2 and 7.5, probably 7.4
Alk 130
Cal 300+ (I quit after 30 drops -- no change -- little pink globs swirling in the sample...???)
Cya 55

Pool specifics are in my sig.
TIA,
BGray