Posted a photo of my pool in another thread to see if I was able to successfully upload photos - and I was! - so, gonna go with my question with regards to why I took the photo in the first place
In the photo, the far wall tends to stay in the shade for the majority of the day - the wall itself faces West, and, by the time the sun gets to where It would normally shine on that wall, it is typically obscured by trees - so, essentially, that entire wall doesn't ever get direct sunlight.
My water chemistry is as follows
pH 7.5
TA 100
CYA 50
TC 6 (kept between 4 and 7 or 8)
CC either 0 or 0.5 - I have had faint pink appear but never a repeatable test - subsequent tests always show no color change (?)
Pool was recently (about 2.5 months ago) repaired and had new liner/water
My concern is that I have noticed small areas of what I think is algae on that far wall - to the right of the ladder where the vertical wall transitions into the deep as well as directly under the return in the shallow end (you can see the return in the photo)
The areas are about 5 inches X one inch and look greenish and brush off easily
I don't see them every time I am brushing, but, about once a week they will appear
I had mustard algae years ago with the old liner while I was a BioGuard slave and don't want it again! Surprised I ever got it under control back then to begin with as my chemistry was so off.
My question is, with the pool clear and not appreciably losing tons of FC daily (between 2 and 3 max) and a seemingly negligible CC reading, should I consider SLAM process - and, if so, is there a likelihood that it would only require ONE application to shock level?
I have a party this weekend and the pool will be getting some considerable use and wasn't sure if this should be addressed before or after the party.
My newbie brain says to go ahead and hit shock level once before this weekend, but, that may well be a totally wrong approach!
