I keep seeing differing opinions when I searched on this, so I thought I would post for myself and continue the debate!
My Daughter keeps complaining that her eyes are stinging when opening them in the water.
Do I lower the PH towards 7.2, or bring it up towards 7.8 to make eyes sting less? My PH is right on 7.5
My TF-100 Tests last night after the swim
PH is 7.5
CYA very little (Did not re-test though I added some last night finally)