I have tried every remover product on the market following the label directions. NOTHING BUT NOTHING is aiding in the removal. Last year I used the cl free system. Had several large stains and green stains. Had pool emptied and acid washed. Changed to a salt generator and now the staining is all over... walls and floor of pool. light markings all over. Tried test kit from pool store and nothing helps. I am open to all ideas. i will attach a few pics. i will be grateful for any help you can offer.
17000 gal giunite pool black stains everywhere
- Thread starter realtorneil
- Start date
Welcome to TFP!
Several of the chlorine free systems use copper. Copper can cause unsightly stains that are sometimes nearly impossible to remove. Of course, these stains might be something else.
A couple of additional pieces of information will help us diagnose things. First, could you post a complete set of water test results? What color are the stains? Are they smooth or rough or somewhere in-between? Did they go away when the pool was acid washed and then come back, or never go away in the first place?
Several of the chlorine free systems use copper. Copper can cause unsightly stains that are sometimes nearly impossible to remove. Of course, these stains might be something else.
A couple of additional pieces of information will help us diagnose things. First, could you post a complete set of water test results? What color are the stains? Are they smooth or rough or somewhere in-between? Did they go away when the pool was acid washed and then come back, or never go away in the first place?
That could be metal stains embedded in calcium scale. That could potentially account for why the stain tests don't remove them. I would try an old sock with a handful or two of dry acid in it sitting on the stain for 30 minutes and see if that has any effect.
That sounds similar to the LEMON test. I placed a lemon on stain for 15 minutes and nothing...
