A little over a week ago I began using the TFP methodology. Prior to this I was using 3" tablets and shocking approx every 2 weeks. I would get mustard/yellow algae occasionally on the walls, predominately the north facing wall but sometimes west and a little on the south. About 1 1/2 months ago I treated the pool with Yellow out. Since converting to TFP methodology, my pool water has been clearer. However a couple days ago as I was working on lowering my TA from 130 to 80 and as my FC approached 6.5 - 7 (CYA 70), I began seeing some mustard/yellow algae on the sides again. I have raised my FC to 13 to be above the 10.5 mustard/yellow algae target in the expanded table and after one day, I have not noticed any mustard/yellow algae on the walls. My overnight FC loss is < 1ppm, my CC is 0.5 and my pool is clear.
(1) Should I do a mustard/yellow algae shock? If so, do I perform the algae shock before since I already pass the criteria for stopping.
(2) If I just keep my FC at or above the mustard/yellow algae target, will this prevent mustard/yellow algae returning? After a period of time at the mustard/yellow algae target, will I be able to lower my FC to the normal targets w/o mustard/yellow algae returning?
Current pool chemistry is: