Black Algae on the side of pool lining

shabba007

Active member
Aug 2, 2013
28
Hi all. I have a salt water based pool which is lined (plastic or vinyl not sure). The pool has been covered for longer than usual (8-9 months) because of Covid as we haven't been able to get to the house which is Italy. A local pool company has opened it for me, but has found quite a bit of what looks like black algae on the side of the pool as shown in the pic. They are saying they haven't seen this in a pool before which is a little concerning. Has anyone seen this or reccommend a product or way to remove it ?

thanks,
 

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ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
18,959
Northern NJ
That looks like mold not black algae. Black algae takes hold in plaster not liner pools.

Is that above water or under water?

 

shabba007

Active member
Aug 2, 2013
28
Its above the normal water line when the pool is open. However, that was found after taking the pool cover off, which had water sitting on top of it, which I assume raised the level to where this mold or algae is. I'm not there to address the problem personally. but a local pool company are having challenges finding a product to remove it.
 

ajw22

Gold Supporter
TFP Guide
Jul 21, 2013
18,959
Northern NJ
The products to get rid of mold are chlorine, elbow grease, and time to work on and dry the areas. Pool companies look for the magic potion they can apply and move on.

Mold likes to grow in dark damp locations. Sounds like under the cover was a good area.

Read up on what is done for mold remediation.