Over the past 3 days we have added 6 stabilizer tablets and 2 1/4 lbs of hardner and neither are rising. The ph keeps having to be added. Since we just put it up again no one has been in it. Does anyone have any ideas why we can't get these levels up?

hardness 100
total chlorine 3
free chlorine 3
ph between 6.8 and 7.2
total alkalinity 120
stabalizer 0

Thanks,
Alicia

4000 gal above ground intex pool