Hi,
This is my first post in this wonderful forum. I am interested in pool chemistry, and I have learned a lot from all the experts on this forum.
I live in Sweden, and the common pool advice in Sweden sometimes differs a bit from your advice here. I have a few questions related to this, here is my first. I hope you have the time to answer (I know you have the knowledge!).
In Sweden, the advice for metals in the water is to oxidize through superchlorination, and then filter away the metals, maybe using a flocculant to improver the filtration.
See for example this page, about discoloured water:
http://www.pahlen.com/eng/poolguiden.php?page=problem
Flocculants are recommended to use to precipitate metals and clump them together to bee able to filter them out.
See for example this link:
http://www.folkpool.se/pool-produkter/p ... kemi-ovrig (Swedish!)
The flocculant here is based on aluminumsulphate.
Intex has a similar advice in a pool manual:
Colored water:
(Description): Water turns blue, brown, or black when first treated with chlorine.
(Cause): Copper, iron or manganese in water being oxidized by the added chlorine. Common.
(Remedy): Adjust pH to recommended level. Run filter until water is clear. Clean cartridge frequently.
In your pool school, you state “there is no practical way to remove metals from the water short of replacing the water…†category/pool-school/metal%20stains
Here’s another site, claiming that staining can result from low pH, low alkalinity and low calcium hardness:
http://www.havuz.org/pool-problems/pool-staining.htm
I agree that this can maybe cause metal corrosion, but isn’t the opposite that would cause staining?
Here´s my questions:
1. Can you or can you not remove metals from the water by chlorination, flocculants and filtration? (Are we maybe talking about metals in different forms?)
2. What are your experience on using flocculants? Are they (only) effective on metals?
3. What chemical reactions are taking place regarding metals in the water?
I don´t know if "the deep end" is the right place for this post, feel free to move it if necessary.
Regards,
SingingSailor
This is my first post in this wonderful forum. I am interested in pool chemistry, and I have learned a lot from all the experts on this forum.
I live in Sweden, and the common pool advice in Sweden sometimes differs a bit from your advice here. I have a few questions related to this, here is my first. I hope you have the time to answer (I know you have the knowledge!).
In Sweden, the advice for metals in the water is to oxidize through superchlorination, and then filter away the metals, maybe using a flocculant to improver the filtration.
See for example this page, about discoloured water:
http://www.pahlen.com/eng/poolguiden.php?page=problem
Flocculants are recommended to use to precipitate metals and clump them together to bee able to filter them out.
See for example this link:
http://www.folkpool.se/pool-produkter/p ... kemi-ovrig (Swedish!)
The flocculant here is based on aluminumsulphate.
Intex has a similar advice in a pool manual:
Colored water:
(Description): Water turns blue, brown, or black when first treated with chlorine.
(Cause): Copper, iron or manganese in water being oxidized by the added chlorine. Common.
(Remedy): Adjust pH to recommended level. Run filter until water is clear. Clean cartridge frequently.
In your pool school, you state “there is no practical way to remove metals from the water short of replacing the water…†category/pool-school/metal%20stains
Here’s another site, claiming that staining can result from low pH, low alkalinity and low calcium hardness:
http://www.havuz.org/pool-problems/pool-staining.htm
I agree that this can maybe cause metal corrosion, but isn’t the opposite that would cause staining?
Here´s my questions:
1. Can you or can you not remove metals from the water by chlorination, flocculants and filtration? (Are we maybe talking about metals in different forms?)
2. What are your experience on using flocculants? Are they (only) effective on metals?
3. What chemical reactions are taking place regarding metals in the water?
I don´t know if "the deep end" is the right place for this post, feel free to move it if necessary.
Regards,
SingingSailor