We opened our brand new pool mid-March and had a slightly rocky start (took ~month to uncover the cause of a leak so fresh water was constantly being added, pH was consistently high, went thru 2 pool companies but now proudly maintaining on our own thanks to TFP). In the past month or so, our plaster has gotten very "blotchy" in appearance. In the photos below, you can especially see this on the sun deck, however, it's persistent throughout the pool. We have NPT PolishedScapes in Silver Reef. I reached out to our plaster company who in turn reached out to NPT who directed us to "add 1 qt Scale Tech per 10K gallons. Brush with combo brush if possible twice a day for 10 days. Clean filter Wait about 3-5 days and see what results you got." They said continue to maintain the pool during this time (i.e. adding muriatic acid as needed for pH).
Has anyone had any experience with this de-scaler and/or is there anything else we should be aware of?
Has anyone had any experience with this de-scaler and/or is there anything else we should be aware of?
That was about it. Reading reviews some people seem to give it high marks, but I don't really understand why. Your blotchy areas look to be more related to the application process more than anything. But we can ask one of our plaster experts 
It's interesting; our neighbors just up the street have the exact same problem. 
Their pool was opened almost a year before ours. 
). It definitely started creeping up this summer and we spent ~3 weeks away at the end of July and into mid-August, and when we got back it was very evident - perhaps got more pronounced during that time.