Black dot stains on bottom of liner. HELP! *pics included*

[thefloatqueen]

I didn’t know which section to put this in, so mods feel free to move it, if need be. Now for my dilemma….

I discovered these annoying little black dots on the bottom of my above ground pool liner. They do not come off at all when brushing and I’m hoping there is a way to get the stains out. I am also concerned about what could have caused them? See the pics below. You may have to zoom in because they’re really small dots. I keep thinking they’re specks of dirt but they definitely are not. They’re annoying and sometimes I feel like I’m getting more and more (that could just be in my head lol). Helpppp!! #CrystalClearWaterProblems Thank you in advance!!

- The Black Dot Stains Queen

 

[Newdude]

Weird. It's kinda nice for once knowing full well that there were no magic potions used whatsoever. So THANKS for that.

I'll go with something dropping / blowing from a tree. IIRC you didn't have any direct overhanging branches, but the woods wasn't far behind the pool.

 

[YippeeSkippy]

Anyone doing a roof work near the pool? How about spreading fertilizer willy-nilly? When I see dots like that those are always my first guesses.

Maddie

 

[Boat Drinks 74]

I didn’t know which section to put this in, so mods feel free to move it, if need be. Now for my dilemma….

I discovered these annoying little black dots on the bottom of my above ground pool liner. They do not come off at all when brushing and I’m hoping there is a way to get the stains out. I am also concerned about what could have caused them? See the pics below. You may have to zoom in because they’re really small dots. I keep thinking they’re specks of dirt but they definitely are not. They’re annoying and sometimes I feel like I’m getting more and more (that could just be in my head lol). Helpppp!! #CrystalClearWaterProblems Thank you in advance!!

- The Black Dot Stains Queen

View attachment 523633View attachment 523634View attachment 523635

I had/have similar black dots in my gunite pool. I put some vitamin C tablets in a sock and crushed them with a mallet. Then I gently scrubbed the dots I could reach and they came right off. Some are a little deeper and I've yet to get to them but will eventually now that I know they'll come up. Give it a try.

 

[duraleigh]

Vitamin C is for removing iron stains and those are not iron. Have you tried to scrape them with your nail? What is the result?

 

[thefloatqueen]

Vitamin C is for removing iron stains and those are not iron. Have you tried to scrape them with your nail? What is the result?

I’m going to try that tomorrow with goggles on when I go swimming. The only time I’ve ever had a stain on my liner was last summer when I didn’t realize I had a Bobby pin in my hair and it fell out and rusted, which left a stain. I was able to get it out. These I have no idea what they are. They look like a lot of the junk I scoop from the bottom that my robot misses. I’m going to try everything y’all suggested tomorrow. It’s going to be a scorcher so I’ll be in the pool all afternoon!

 

[thefloatqueen]

Anyone doing a roof work near the pool? How about spreading fertilizer willy-nilly? When I see dots like that those are always my first guesses.

Maddie

Not at all! It’s so weird. I didn’t experience this last season (first season with my new pool) or even back when I had my Intex. It’s a mystery lol

 

[thefloatqueen]

I had/have similar black dots in my gunite pool. I put some vitamin C tablets in a sock and crushed them with a mallet. Then I gently scrubbed the dots I could reach and they came right off. Some are a little deeper and I've yet to get to them but will eventually now that I know they'll come up. Give it a try.

Dumb question…but where do I find vitamin C tablets? When I look on Amazon, I keep seeing supplements lol

 

[thefloatqueen]

Weird. It's kinda nice for once knowing full well that there were no magic potions used whatsoever. So THANKS for that.

I'll go with something dropping / blowing from a tree. IIRC you didn't have any direct overhanging branches, but the woods wasn't far behind the pool.

Nope! Only liquid chlorine, boric acid, dry acid (yeah yeah yeah, I know… but I haven’t used much at all this summer thanks to lower TA and adding borates!), and some dry stabilizer a few times when my CYA needs a boost. No clarifiers, algaecides, floc, or any of the weird junk lol

 

[Newdude]

but where do I find vitamin C tablets? When I look on Amazon, I keep seeing supplements lol

That'll do. This one is cheap