Chemistry after acid wash

Aug 7, 2015
Scottsdale, AZ
My small, pebbletec, salt water pool was acid washed seven (7) days ago. The cyanuric acid is at 45 ppm so far, but the chlorine reading is extremely high. I'm sure the pool water was over chlorinized when the pool was refilled. Can I expect the chlorine level to drop to normal range, and how long might that take after an acid wash?