I just completed treatment for metal staining (fill from well) and have added washing soda to raise the TA and PH. At this point I want to raise only the TA and have added 32 oz of baking soda, waited overnight to test it has had zero effect on the TA. Should I just keep adding baking soda? To get it to the recommended range of 100 I will need a lot! After reading some posts on TA, I normally do not have issues with PH and fluctuations, do I need to raise it?