While copper is a common cause of pool stains the accumulation of other minerals can lead to staining as well.
What causes metal stains in pool.
In the vast majority of pools metal staining comes from iron.
This will result in blue green teal black or dark purple stains.
These typically produce only isolated rust stains where the metal object was laying on the surface and do not raise metal levels in the water.
If you suspect a stain is caused by iron try the vitamin c test.
Iron copper manganese can come out of solution if your pool water has high levels of metals.
Heavy rains and flooding with mud or mulch entering the pool will also elevate metal levels.
Many lawn and garden fertilizers can contain high levels of iron copper manganese and other heavy metals.
It could be a nail bobby pin or a pop can.
Make sure that such items are removed immediately upon being discovered.
Staining is caused by organic matter such as algae inorganic metals or water trapped beneath plaster surfaces.
If you have ever seen discolored water or pools with metal stains that s an obvious sign of metal content in your water.
The metals that commonly cause pool stains are iron manganese copper.
Simply dropping a metal item in the pool can cause rust stains.
The brown stain might be caused by the ioniser that deposits iron metal in your pool you need to clear the stains using ascorbic acid then consider reducing iron metal levels in your pool by draining and refilling a portion of your pool water or use a metal remover such as proteam metal magic to remove metals through the filter and avoid brown stains when you shock your pool or when ph is low.
Stains will be ugly and visible to anyone looking.
Iron when oxidized turns brownish or orange in color.
These orange stains are from rust.
Managing and preventing stains especially those from metal oxidation can be challenging.
Iron is from well water corrosion of iron pipes and fittings and will result in rusty brown gray or greenish brown stains.
In addition to objects like bugs and leaves falling into your pool or algae turning the water green you can find metal stains along the walls of the pool.
Maintaining proper ph in your pool is important to mineral stain prevention.
Copper has more of a light green or even turquoise look to it when it gets oxidized.
Nothing bothers pool owners more than those unsightly blotches and discolor ations on an otherwise unblemished pool surface.
Copper is from ionizers and corrosion of copper and brass pipes.
For example calcium stains appear as white crystals or patches around plaster grout.
Any metal item that can rust also can stain your pool.
High or low ph can lead to metals coming out of solution to stain your pool.