I keep vacilating on what to do about a yellow "film/dust" that accumulates on seams and creases, mostly on the opposite side of the returns.
I was going to do yellow algae shock ie 40ppm shock
But the overnight FC Loss test showed under 1 as FC loss, CC was at .5 or lower, and water was clear, so I am not sure what the yellow stuff is.
The yellow dust has multplied over night so I need to nip it The water is still fairly clear unless I brush the yellow stuff. But the yellow stuff is all over the bottom though thicker is some places
Here are my levels
FC 8 (I got scared because my fc dropped to 1.5 so I added bleach)
CYA 60 Had dropped to 30 a few days ago so I raised it. I added raise fc to 8 at that time because it had dropped to 1.5 over night
TA 70 (pool store says it is 100!)
Phosphate 600 (according to pool store, I do not have that test)
Pool store says 40 ppm will fade my liner and say I should use 30ppm then add Banish Agecide thew next day
I am wondering if I go ahead and do the Algecide, will it hurt anything or cause any additional issues? Like having to use it the rest of my life
How long does it take for the 40+ ppm to reduce to 5ppm?
What is the highest ppm of chlorine allowable to swim in?
Will 40ppm fade my liner?
Is there any downside to using an algecide instead? ie will using that mean I have to keep using it from now on?
If I do the high chlorine shock treatment, this is my current understanding of the method with some questions:
Vac to waste
Reduce Ph to 7.2
remove lights and ladder and skimmer doors
Raise FC to 40ppm, my CYA is 60-70 (I just raised it as it had fallen to around 30)
Should I keep pump running on high the entire time?
Put all the pool toys and tools and swimwear in the pool
How long should the FC be above the min level (5 for me)
How long does it take for the FC levels to be reduced to normal
Some say the Fc should never be abobe 4 ppm for swimming?
Should the SWG be off during this treatment?
Thanks for advice