Testing pH, AL, CH with high CL

[fcfrey]

Unfortunately the answer is yes for pH. Chlorine will bleach out the result. You can add a drop or two of Sodium Thiosulfate (before you add the phenol red) (that is the R-0007 reagent in the TA test) to kill the chlorine but it may alter the results slightly.

The only good alternative is an electronic tester but the probes need calibrated and replaced periodically.

EDIT: Order Ben's kit ---- he has the chemicals sized for the test so you don't run out of the first reagent before the second.

I wish I had done this --- I have bought 6 different kits from taylor which cost a Whole lot more