I had the same situation 4 months ago. As usual, Carl's advice is 'spot on.'

Keep working on the Ph to get it down. Personally, I target 7.2-7.4. With SWG, it is a constant fight to get Ph down. If I miss two or three days, it can creep back up to 8, no problem. I ususally add acid daily. Just the way it goes for me.

And as you add acid, the TA will go down as well. Use bleachcalc (on this forum or you can google it) to figure out how much baking soda it takes to raise your TA 10 points. then you know how much to add. as a precaution, add the baking soda in two doses over two days, with test inbetween, so you don't overshoot. because of the relationship between lowering Ph and TA, you might want to shoot for 100ppm on your TA so you have 20ppm buffer (down to 80) to work with. Just a suggestion, but works well for me.

It can be frustrating. Stick with it. Eventually you'll get a feel for how much acid you are adding and how often you need to add baking soda. You'll find yourself testing at less-frequent, but safe, intervals that take up less of your time. It does get better pretty quickly.

If you have a costco nearby, they sell baking soda in a 12 lb bag. works out to be about 40 cents a pound. Cheap.