- Jul 4, 2022
- 17
- Pool Size
- 15000
- Surface
- Fiberglass
- Chlorine
- Salt Water Generator
- SWG Type
- Pentair Intellichlor IC-40
This is a re-post from another thread in Algae Prevention, as the issue occurred during SLAM. Water chemistry was on point, OCLT passing four nights in a row, water was crystal clear but with a green hue/tint:
*UPDATE*
The tint is clearly metal-based, not algae-based. Everything is within tolerance, with the exception of high FC and low CYA, both due to SLAM:
FC: 13
CC: 0.5
pH: 7.2
TA: 90
CH: 250
CYA: 30
Yesterday, FC didn't budge all day at 19.5, and this morning was still 19.5. Fast-forward, cover off the pool all day and FC down to 13.
My daughter and her friend are both blondes. My daughter’s hair is now tinted light green, but her friend’s hair is not. Fingernails are also not discolored. Yellow/brown staining exists almost everywhere - sides, steps, swim ledge, bottom - particularly worse in the shallow end but also present in the deep end.
I was positive this was iron, until the green hair, but it’s still odd that my daughter’s blonde hair turned green while her friend’s blonde hair did not…her friend lives next door, and we use the same (neighborhood shared well) water source for showers, etc.
I’m debating and somewhat confused on my next steps here. Metal stains happened the first and second seasons, though there were just a few. This season, it’s everywhere. It’s an in-ground pool, so the same water has existed (minus top offs) since 2022. I have a Pentair MasterTemp 400 heater, for which the heating core is copper, but used it for a bit the first season and all of the second season with balanced water and no problems, so I can’t believe it would be corrosion…
I put powder AA in a sock and wiped it across the stains and they instantly “lifted” onto the sock, so this is inorganic staining. I understand the process for AA stain treatments of the entire pool, but I’m super hesitant to constantly use a sequestering agent, especially if there’s copper. Water exchange sounds like a crazy-involved process, and the water rates here are exorbitantly high.
Any advice on:
1. The potential type of metal staining? Could it be both iron and copper?
2. Those who have removed metal staining, what was your preferred solution and why did you choose that solution?
*UPDATE*
The tint is clearly metal-based, not algae-based. Everything is within tolerance, with the exception of high FC and low CYA, both due to SLAM:
FC: 13
CC: 0.5
pH: 7.2
TA: 90
CH: 250
CYA: 30
Yesterday, FC didn't budge all day at 19.5, and this morning was still 19.5. Fast-forward, cover off the pool all day and FC down to 13.
My daughter and her friend are both blondes. My daughter’s hair is now tinted light green, but her friend’s hair is not. Fingernails are also not discolored. Yellow/brown staining exists almost everywhere - sides, steps, swim ledge, bottom - particularly worse in the shallow end but also present in the deep end.
I was positive this was iron, until the green hair, but it’s still odd that my daughter’s blonde hair turned green while her friend’s blonde hair did not…her friend lives next door, and we use the same (neighborhood shared well) water source for showers, etc.
I’m debating and somewhat confused on my next steps here. Metal stains happened the first and second seasons, though there were just a few. This season, it’s everywhere. It’s an in-ground pool, so the same water has existed (minus top offs) since 2022. I have a Pentair MasterTemp 400 heater, for which the heating core is copper, but used it for a bit the first season and all of the second season with balanced water and no problems, so I can’t believe it would be corrosion…
I put powder AA in a sock and wiped it across the stains and they instantly “lifted” onto the sock, so this is inorganic staining. I understand the process for AA stain treatments of the entire pool, but I’m super hesitant to constantly use a sequestering agent, especially if there’s copper. Water exchange sounds like a crazy-involved process, and the water rates here are exorbitantly high.
Any advice on:
1. The potential type of metal staining? Could it be both iron and copper?
2. Those who have removed metal staining, what was your preferred solution and why did you choose that solution?
