Hold the phone on the acid wash unless this is something you want to tackle yourself. Don't waste your money paying someone and here's why:
This is 10 year old Pebble Tec and its pretty easy to see how much color was lost when compared to the areas that I chipped out
So I did an experiment for your benefit. Here is a section of the wall that I acid washed. You can see some change in the color but not enough to warrant draining and acid washing the entire pool. For the quote above where it was mentioned that a Pebble pool can get freshened up from the wash , I think that pertains much more to pools that are poorly maintained and they have heavy stains and scaling. Obviously an acid wash would be an improvement. In your situation I just don't see it being worth it.
That was undiluted trade strength acid that was left on for 5 minutes. I did a section where I left the acid for 30 minutes and that definitely brought some color back but that was because tons of pebble fell out and exposed plaster that has never seen the light of day.
Here is a chip of the original color compared to the existing section that was acid washed
And so you don't think I'm crazy, this pool had a beach entry that was terribly steep, so much so that several people had fallen while entering the pool. These steps were built and plastered with a rough texture to blend with the pebble surface. The whole pool will be shot in Mediterranean Blue AquaBright and the slide will get a coat of Sahara Sand.
If you really want AquaBright I might be willing to make the trip...the only problem is I absolutely hate driving so I will need Danny to be my chauffeur.