Quote Originally Posted by Infidel
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.
I thought a low PH caused Algea. May be incorrect, but if this is true and your Taylor test kit is accurate, you would be hurting yourself. Again...I may very well be wrong on the ph/algea thing. You should wait for the experts to give you an answer.