You need to determine if the stain is organic or a metal stain.
Brown stains on pool liner.
Using a trichlor tablet hold it on the stain for about 3 5 minutes.
And brown stains concentrated on the bottom can likely be attributed to dirt stains typically enhanced by calcium buildup.
Treat your pool liner for your type of stain.
The first step to deal with organic materials is to shock your pool and scrub it.
Organic pool stains are treated by shocking the pool with a chlorine shock treatment.
Watching the pool like a hawk for foreign objects keeping it clean and keeping it balanced are the main ways to keep stains off of your pool liner with special attention to how you add pool chemicals.
If the stain lightens up or disappears it s organic.
Prevent vinyl pool stains.
Go to this page to see how to treat your pool for brown algae.
Use a stick or a pool pole not your finger.
Doheny s also carries a spray on vinyl cleaner that can be used if your pool is drained.
Once the algae has appeared onto a vinyl pool liner it is not hard to get rid of but it is a good indication it is time to check the pool s chemical levels.
If it s closer to a brown black and is found on the sides of the pool as well then you might be looking at metal.
Mineral pool stains are treated with acidic stain removers.
Scrub the algae with a soft nylon brush.
Preventing pool liner stains requires vigilance.
How to remove brown algae stains from a vinyl pool liner by launie sorrels.
If that doesn t work try a stain remover.