I was trying to test TA today (Taylot K2006) and it should turn green then red...mine turned blue then yellow. It worked a few days ago when TA was 100. I used left overs from last years testing solutions and this years and both gave same results every time. Not sure what to make of it.
Todays other results (BTW I am fighting a yellow stain that I am trying to superchlorinate w/ a CYA 90-100)
FC >30 (takes too much reagent to find true FC, last was 50)