Pool stain HELP!!

[AV1994]

Hello everyone, I am helping to take care of my father in laws pool who sadly passed away earlier this year. We are having an issue with stains on the liner. I thought they might have been iron stains, so we tried some ascorbic acid but it didn't seem to have any real effect. Didn't make anything worse or darker so I don't think it's copper? I will attach some photos and hopefully someone can point me in the right direction. I would greatly appreciate it. My father in law was a big time advocate for TFP though he didn't post all but once. I know he was always using this site to help if he had issues but he had this down to a science so I'm trying to make sure we keep it looking as best as possible! Thank you very much!

 

[PoolStored]

It looks like you have visible algae. If so, follow the SLAM process to clear the pool first. Link-->SLAM Process

They are likely organic staining...here is our stain guide.

Stains in Your Pool

The stained pool is beyond embarrassing. Our in-depth Guide to remove stains in your pool will help you to remove the stains and prevent them in the future.

www.troublefreepool.com

 

[AV1994]

Thank you for the help got it looking much better!! Doubled the shock treatment and gave it a good scubbing after it sat for a while. Got one spot left a little bit as seen in the last photo but man its so much better!

 

[Mdragger88]

Glad its looking better.
Not sure what you mean by “shock treatment” but be sure to follow the
SLAM Process instructions to completion to be sure you eradicate any algae & prove that its gone.
We recommend using liquid chlorine for slam.