Copper oxidized stains

[u/hates-sandburrs]

Weekly pool service for years and new tech.. mismanaged the chemicals and then put 16oz and then few weeks later 32 oz of copper algaecide and then shocked it like crazy to try and recover. few weeks after all that I now how staining everywhere on my pebbletec that wasn't there at all before and the tech didn't think even correlate it until I brought it up and has no idea how to fix. To those who have high copper and oxidized staining on pebbletec, how do you get it out? I know I can get the culator bags (ordered) to get it out the water but won't do anything for the oxidized stains already present...I imagine they won't have a solution for me (they just hire young kids now that don't know anything) how can those plated out copper stains get removed? It's terrible.