First of all Happy new Year !
I have a brand new vinyl pool with SWG.
During the summer I always had to decrease the PH using muriatic acid.
My average values were:
PH 7.6 (I've had to add acid twice/week to maintain this level )
Water temperature about 82F (28C)
A few days ago I've decide to switch the SWG bypass, empty the SWG cell and move to bleach to control FC, this because I'd like to preserve the cell and because the low clorine demand during the winter.
This spring/winter We are having heavy rain and the spring water we use for the swimming pool was heavily diluited and PH dropped down sensibly, today I've got the following value:
FC 5 (it increased despite I've reduced the pump/SWG time from 6 hours this summer to 1,5 hr in the past month)
CYA next to zero
Water temperature about 50F (10C)
Should I increase PH ? What do you recommend for it (backing soda, diluited caustic soda, aeration .....) ?
Should i correct any other value?
Thanks for you advise !