OK so it's time to close down and here are my numbers:
The pH needs to be adjusted to 7.2-7.5 which I will do this evening by adding muriatic acid.
From what I have read I should keep the FC at shock level for 2-3 days before closing which is the plan.
Also read that I should use polyquat. Well taking inventory I have 2 copper based algaecides at 3.3% and
a gallon and a half of pool brand algaecide 40. Is the polyquat necessary or could I use the others?
I have always opened to a green pool in the spring both using pool store chems and the BBB method. It's not
a big deal and usually clears up in 4-5 days max. Is there something else I should be doing to prevent this? I waited
until the temp was well below 60 last year and opened in april to a green pool. I maintained shock level
2 days before I closed last year as well.
And the last question is about my vinyl liner. It's the original 2005 ish and probably needs replacing soon, but since I started using the BBB
method I have noticed a rapid decline in the appearance of the liner just above water level. Is this due to old age and sun exposure or possibly dumping bleach and acid in day after day? I will attach a picture for a visual.