You need to determine if the stain is organic or a metal stain.
Brown stains on pool liner.
Prevent vinyl pool stains.
And brown stains concentrated on the bottom can likely be attributed to dirt stains typically enhanced by calcium buildup.
If that doesn t work try a stain remover.
All natural pool enzymes will eat away at organic material to remove the pool stain with little or no scrubbing and without the use of harsh chemicals that damage pool liners.
Preventing pool liner stains requires vigilance.
Scrub the algae with a soft nylon brush.
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.
How to remove brown algae stains from a vinyl pool liner by launie sorrels.
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.
Treat your pool liner for your type of stain.
Using a trichlor tablet hold it on the stain for about 3 5 minutes.
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.
Go to this page to see how to treat your pool for brown algae.
If the stain lightens up or disappears it s organic.
Organic pool stains are treated by shocking the pool with a chlorine shock treatment.
Use a stick or a pool pole not your finger.
In most cases this is all that is needed with vinyl pool liners.
If your stain is all around the waterline of the pool because of material floating at the top an enzyme based cleaner will help to break down organic compounds and oils.