Yes, you need to be adding acid and testing pH often to keep the pH low while you aerate. Only when you're done do you need to let the pH rise back up.

The more often you can manage to test and adjust, the better it will likely go.

Something else worth mentioning. You can increase the CYA to 60ppm and reduce some of the chlorine loss due to sunlight. In Texas, it probably beats down just like it does for me here in FL. The circupool user guide recommends 30-60 CYA - I'd go 60. Also, the 7ppm fc is a little high of a target with a swcg. You really only need to be between 1-3. Lowering the output on your swcg to target this range will help keep pH climb in check too.