Do I need a acid wash?

[aquam4n]

Pool was a swamp, I decided drain it and start over. Do these white areas need to be completely removed before refill? I pressure washed it. It's pebble tech

 

[HermanTX]

Generally acid wash is not advised. The power wash is the recommended solution which you did. It is hard to put your photo in context. Is this a very small area in 1 section of pool?
You could put some MA on a rag (wear gloves, goggles and mask covering over nose/mouth) and dab it on the white spot to determine the effect.

 

[YippeeSkippy]

If the pressure on the pressure wash machine was too high it could have cause plaster finish damage.

 

[Bperry]

Pool was a swamp, I decided drain it and start over. Do these white areas need to be completely removed before refill? I pressure washed it. It's pebble tech

If it was a swamp I wouldn’t acid wash or pressure wash. Fill it back up and do the SLAM and see if things even out.