I don t believe its an algae but.
Green stain vinyl pool liner.
However you cannot treat vinyl liners with acid wash so you may be out of luck.
I ve actually struggled with this issue going on 2 years now.
Green or green brown pool stains organic usually caused by decomposed leaves twigs algae or other plant life.
I have a mysterious light brown stain that appears randomly throughout the pool.
In order to treat your vinyl liner stains you first have to identify if it s an organic stain or a chemical stain.
And vinyl liner pools they present a particular challenge.
To identify the type of pool stain you re dealing with match it s color s to one of the descriptions below.
Pool liners have to be handled with great care when cleaning stains off of them or you can damage and discolor the pool liner.
I have an inground pool with vinyl liner 18 x 36.
Cleaning up a swampy green pool is no walk in the park it can take hard work balancing cleaning and filtering the water to return a dark green pool to swimming condition.
My liner is completely covered with stains that look like algae on the floor and walls.
The center of the pool has about a 2 3 foot.
Over a period of time pool liners tend to accumulate different types of stains.
Having unsightly stains on your vinyl pool liner however can quickly make your otherwise perfect looking pool look anything but appealing to swimmers in your household.