Stains or Mottling?

MuyFresco

Member
Mar 22, 2025
6
Charleston SC
Pool Size
16300
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Hayward Aqua Rite Pro (T-15)
Good Morning Everyone,
Recently purchased our first home with this older gunnite pool. It has discoloration of various forms and colors throughout. I have some jacks stain ID on the way for next week, but in the meantime thought i'd ask.

Does this look like specific stains, or just the natural age of the pool showing?

*liner is gunnite with an aggregate finish
*pool is old - somewhere around 10-15 years i believe
*the pool guy who was taking care of it before us said that the owners let it go to heck and it was basically black when he took it over. This makes me think it could be metal staining due to some heavy shock and algea treatments
*the discoloration has been there since i took it over in january. not positive how long it has existed otherwise
 

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