I've been a pool owner for about a year, and thanks to this website I've never really had a water problem. It's always looked good. Now that I'm fairly comfortable with it, I'm trying to dial it in a little tighter. One thing I've never been able to conquer is pH bounce - I was adding acid 2-3 times a week, with a little bit of work I've gotten it down to about every four days. What I'm wondering is if this is just what I'm stuck with, or if there is anything else I can do to help stabilize it a bit more.
19K gallon play pool, Hayward Super II pump 2.0hp 1.2 SF
In-floor returns (21 in pool, 6 in hot tub), no in wall return aside from a piddly aerator
T-15 SWG, only a year old
Hayward 6020 DE filter
I run the pump 6 hrs a day (7am-1pm) with the SWG set at 35%
pH - maintained between 7.5 and 7.8, moves a tenth a day
FC - 6.0
CC - 0
TC - 6.0
TA - 80
CYA - 70
CH - 575
Borates - somewhere between 30-50, I really struggle to read the strips
CSI is -0.05 with a pH of 7.5 and 0.29 with a pH of 7.9, but I try to hit it with acid before getting that high.
Everything remains relatively steady, I rarely have to adjust anything but pH. Borates are a new addition from about a month ago; I believe it to be responsible for the minor reprieve on days between acid, though it doesn't change how much I need to add over time.
Chlorine remains pretty constant. I have considered dialing the chlorine back a bit but have left it alone as it just started to get really warm in Phoenix.
I haven't been willing to let my pH above 7.8 for any longer than a day to see if it stops rising.
So....is this just what I should expect as far as keeping my pH balanced? It's not a huge nuisance, but with everything else so stable I'm getting greedy. Is there anything else I can do to help stabilize my pH?
A few other less important questions.........
Is six hours sufficient run time if the pool continues to stay clean and maintain a good chlorine level? It's freaking hot here (110+) and will be for the next three months.
If my FC number remains at 6, should I reduce my SWG % to try and get it down closer to 4?
At what point should I consider fixing my high CH number? The water here is just hard, so it it's going to be a recurring problem.
Does having a bunch of pop-up heads rotate the water faster than one or two wall returns? (just curious)
And finally....how I am supposed to get the dirt off of the floor with my vacuum when those pop-up heads are throwing it all over the place? I do think the pop-up heads help it stay cleaner, longer, but it does make it difficult to get it spotless.