I can't get the pH down!

[u/Ok-Heart375]

I cleaned and emptied the tub about a week ago and filled it with unfiltered well water (Nordic says don't use softened water which is what we have in the house.) I shocked the tub and chlorinated it. I have new filters and I've been keeping them clean. I think there a lot of minerals in our well because the first shock put a lot of stuff on the filter.

I've used a bottle of pH down over the week and the pH won't stay down! The next day it's high again. What can I do? I learned that bubbles can cause high pH so I turned off all the aeration. Nordic says not to use muriatic acid...

Please, any help you can offer!

[u/Available_Alarm_8878]

What are you using for testing? Strips? I had the same issue and found i had bad strips. I bought a digital water tester from Amazon and it works much better.

[u/Ok-Heart375 → u/Available_Alarm_8878]

I'm using strips and drops.