- Feb 18, 2010
- 41
- Pool Size
- 11000
- Surface
- Plaster
- Chlorine
- Salt Water Generator
- SWG Type
- Hayward Turbo Cell (T-CELL-5)
Good morning! Would anyone care to guess what this is in my pool? The spots started perfectly round in the deep end of my pool. I’ve tried metal out, ascorbic acid and brushing. Nothing is touching it. The area has gotten bigger and I’m noticing a few spots now in the shallow end!