The iron depending on the severity provides with a yellow to brown stain in the pool.
Brown stains on bottom of pool liner.
Vinyl pool liner fading can also be an issue worth mentioning.
If the stain lightens from a small application of acid to the stain then it is a mineral type of stain.
Place a vitamin c tablet ascorbic acid on the stain for a short time period.
Sometimes caused by decomposed bugs or critters.
If you see brown red yellow staining that could be do to too much iron.
Copper is from ionizers and corrosion of copper and brass pipes.
To identify the type of pool stain you re dealing with match it s color s to one of the descriptions below.
Calcium and salts can result in white deposits on the liner.
In this post we discuss identifying cleaning and preventing swimming pool stains from various sources.
Even the manganese can also give a quite dark brown or even a blackish stain.
One of the most common causes of stain is the salt.
The metals that commonly cause pool stains are iron manganese copper.
These stains normally occur after a long winter or thunderstorm.
This will result in blue green teal black or dark purple stains.
For stains on a horizontal surface you can test the surface for mineral staining by using a small amount of acid on the stain.
Organic pool stains come from dead algae small animals or organic debris.
Adding salt to the salt water pool.
Stains that appear reddish brown or very dark are typically related to metals in your pool water.
Green or green brown pool stains organic usually caused by decomposed leaves twigs algae or other plant life.
The most common reason for algae to appear in a swimming pool is from improper ph and chlorine levels.
Calcium or sodium salts can leave whitish deposits on your pool liner.
Iron pool staining can be brown red or a yellow orange color.
What are these brown stains in my pool.