Will adding cyanuric acid also lower pH?

Numbers from yesterday:
FC 1.5
CC 0
pH 7.8
TA 125
CH 175
CYA <30 (dot disappears right before the top of the tube)
Water temp: 80

Will continuing to add cyanuric acid lower my pH or should I also be adding muriatic acid?

Thanks!

Not really. You'll need muriatic acid to lower pH.