I've been battling mustard alage for the past month without success and after reading the articles at TFP, I know why. I picked up the Taylor 2006 kit and tested last night - here were my results:
CYA - 100 ppm - tested 2x, 2nd time with 1/2 pool, 1/2 tap as recommended by the test kit.
TA - 90ppm
CH - 160 ppm
PH - between 7.2 and 7.4 on the kit.
FC - between 16 and 17 ppm
CC - 0
There was a bit of confusion on the CC test as it was listed *after* the FC test. most of the other tests say explicitly to use the water from the previous test, but this one was unclear - do you start fresh or do you use the water you cleared from the FC test? I did both ways and still came up with 0 (yellow - not pink)
Pool water is clear, but I haven't brushed it in about a week. I vaccummed to waste last week and the alage has started growing again. I'm certain it is alage and not polen.
Do I bring the FC up to 39 or should I drain 1/4, fill, drain 1/4, fill until the CYA is much lower? What is cheaper?
I can get 10-12% Liquid in 2.5 GAL jugs from a store locally and I'm curious as to how much I need to add.
Thanks for the great site, looking forward to getting the pool clear and "trouble free".