thank you for the guidance.
July 8 evening added 2 gal bleach ad one gallon muriatic acid
July 9 7am
ph 7.5
total chlorine 8-10+

Have a cartridge ordered; will take off Nature2.
Will continue to run pump 24/7 on low.
will add more muriatic acid

water is clear and sparkly. No metal deposits! Been rinsing the filter about every 2 days.

Thanks again!