Hi Team,
An update and questions...test results from earlier this morning are:
pH = 7.2
TA = 90
CYA = 35
FC has been drifting down since mustard algae shock attack. My estimate of FC is 15. I had to use dilution test as I am out of reagent to use with K-2206 test.

Questions:
1) is there a way/procedure to use fewer drops of R-0871 when repeatedly testing FC at mustard algae shock levels?
2) should I continue to lower TA (by adding acid to lower pH then aerating then repeating)
3) When should I add CYA to raise it? I've added several times this summer and am surprised it is as low as 35 but I triple- checked it today

I'm hoping that I have successfully removed the mustard algae but time will tell. No more extended trips away from home/pool should help.
thanks for your continued assistance!