Decided to join the party here after running into an end of the season bio disaster known as mustard algae.
I corrected the MA issue with a ton of shock which sent my FC level to what I can tell was 50+. Yeah I know I never should have done that but I I was done playing games , 10% Chlorine Bleach was on sale at Ace for $2.49, and our nightly temps have dipped into 30's. So it was time for action because soon I will not be able to run the pump because it will freeze.
The Chlorine levels are going down after 3 days of full sun and repeated back-washing and filling with fresh water from my sand point well. It is probably somewhere in the 20-30 ppm range now. I used to install AGP pools and put mine in July of 2015. Since dropping my 50+ thermonuclear bomb I have been checking the Liner, pool parts, and pump. Everything looks good. Liner looks as dark blue as the day I put it in.
Since the liner is new and hasn't been exposed to UV for that long so it is going to be fine. Not to mention I can always replace it myself.
I am going to enroll into the lifer's club here and get a t-100 in order to avoid another bio disaster.
Strangely enough after working as pool installer and working for a pool store (delivery and warehouse) for a number of years I know very little about pool chemistry.
Why is that? Because I wasn't a salesperson. A lot of people at pool stores are sales people and get paid on commission. Back in the 80's in the summer some of the sales guys would make $500+/mo on commission on pool chemical sales. Obviously a racket. That is why I don't set foot in a pool store.
So don't ever ask a pool installer about pool chemistry because he doesn't know unless he owns a pool. Most installers don't have pools because they can't use them because they are working 12 hour days during swim season.