Had our in-ground sw pool built in October 2023. ~10,000 gallons, 18x23' with a 4' sun ledge.
In April 2024, we noticed a ~3 spots on our sun ledge near the return jet, and 1 on the bench in the deep end which is closer (but not that close) to the other return. After some googling, it sounded like metal stains, even though no water tests showed metal.
Ran "No Metal" through the pool, rebalanced chemicals and used vitamin C to reduce/remove the stains over the summer. Didn't completely get rid of them but unless you were looking wouldn't really notice.
Now over this winter, there are about 20 of the same spots that have appears AND all of our plastic parts (return jets, skimmer baskets and main skimmer basket) are all yellowed to varying levels.
All metal readings consistently showed 0.0ppm, and no major issues with pool chemicals.
I've run more no-metal, and added a CuLator metal eliminator into the skimmer from TFP's recommendation (been about 3 days but no change in color). I can't figure out what could be causing this.
I keep the pool clean, brush the ledge etc. But clearly is has to do with the return jet + ledge, since the other return is in the deeper end of the pool (~5 ft deep), and doesn't have this issue (besides the 1 spot last year).
Any ideas?
In April 2024, we noticed a ~3 spots on our sun ledge near the return jet, and 1 on the bench in the deep end which is closer (but not that close) to the other return. After some googling, it sounded like metal stains, even though no water tests showed metal.
Ran "No Metal" through the pool, rebalanced chemicals and used vitamin C to reduce/remove the stains over the summer. Didn't completely get rid of them but unless you were looking wouldn't really notice.
Now over this winter, there are about 20 of the same spots that have appears AND all of our plastic parts (return jets, skimmer baskets and main skimmer basket) are all yellowed to varying levels.
All metal readings consistently showed 0.0ppm, and no major issues with pool chemicals.
I've run more no-metal, and added a CuLator metal eliminator into the skimmer from TFP's recommendation (been about 3 days but no change in color). I can't figure out what could be causing this.
I keep the pool clean, brush the ledge etc. But clearly is has to do with the return jet + ledge, since the other return is in the deeper end of the pool (~5 ft deep), and doesn't have this issue (besides the 1 spot last year).
Any ideas?
