Is it normal that FC is higher than TC? My test results are:
I have just started to move away from pool shop measurements and adopted the BBB method as discussed in forums here.
I use a Milwaukee MI413 Photometer for the Chlorine check and a basic Taylor test kit for TA and PH. My CYA and CH is done via a strip test at my local pool shop, so reliability is questionable. I have only been a pool owner for 12 months but my pool is roughly 20 y.o.