Quote Originally Posted by PaPoolNewB View Post
So only lost .5ppm overnight which was unexpected. Thought with so little CYA in the new water would have lost more.
CYA protects chlorine from sunlight (UV photolysis) -- there's usually not a lot of sun at night , so low CYA does't affect OVERNIGHT chlorine loss, only daytime chlorine loss.

I plan to test again in about an hour so I can see how much I am losing from the AM to the PM just to keep track.
AM to PM testing detects loss to sunlight. There's no need to test TA, CH, CYA every time.


Once CYA is correct and other numbers are in line I plan to switch to 2 hours on 4 hours off schedule. Hopefully that will be ok, what are initial signs to look out for if not running pump enough ?
Cloudy water -- even though there's adequate chlorine.


I do believe there is a Solar Cover in basement, not sure of the condition of it but I will pull it out today and take a look. What do I look for to know whether or not it is functional ?
Brittle plastic -- you don't want 10,000 blue plastic flakes in the pool! And, clean it off before you put it in the pool!