Okay, got another question for you....
Along with the SWG we have a mineral cartridge and the pool guy is telling us we don't need free chlorine higher than .5
Here are my water analysis:
FAC = 2 they say .5 is enough due to mineral cartridge
TAC = 2 " " "
PH=8 we've been adding half gallon of muriatic acid in deep end weekly with no help. They said to use dry acid as the Muriatic drops TA which raises PH again.... dry acid is much more expensive and Alk up is cheap baking soda... Thoughts?
TA=100 he said he wants us closer to 120
CYA=40 they said to add more and get to 80
calcium hardness=200 said try to get to 250-300
Salt = 3200 exactly where we want to be
iron = none
Phosphates = >1000 we put in phosfree and then didn't clean filters so we are trying again. Note we did have small black dots on the new plaster that when we used the Phos Free disappeared but the SWG wasn't working so it may have been due to the bad sensors on the SWG not producing chlorine.

Pool is crystal clear otherwise.