Since switching to the BBB method I'm using a Taylor test kit. I'm constantly fighting algae, keeping my Cl high ~20ppm (80ppm CYA).

The Cl doesn't appear to be working, even at shock levels >25ppm.

My Taylor kit says the pH is 7.2, my poolmaster kit says my pH is >8.2.

WTF???? is going on. I realize I've got a lot of chlorine to neutralize with the sodiumthio, so I'm adding 2-3 drops of reagent 4 (poolmaster kit) prior to the phenolphthalein. Doesn't matter, still reading >8.2.

I'm starting to believe the cheap poolmaster test because the cl is appearing innefective. Could the premixed Taylor reagent not have enough sodiumthio in it for high Cl levels, giving a bad pH reading?

I'm about to start dropping the pH level, in spite of what the Taylor kit says. It's a new kit btw, only got it two weeks ago, reagents should be fresh.