What is this?

[FLNewsGuy]

Hey pool pals!

Anybody know what this green stuff is on the ledge of my pool? Or how I should go about getting rid if it?

Thanks, as always! Happy Fourth of July to fellow US'ers!

[attachment=0:ur2tnitu]ImageUploadedByTapatalk1372962810.724073.jpg[/attachment:ur2tnitu]

 

[Laenini]

Only guessing, but to me it looks like moss? Just like what you might find growing on stones near a pond I think? I would guess some bleach and a scrub brush would take care of it.

 

[woodyp]

Moss. Either bleach or some diluted muriatic acid and a good stiff brush.

 

[JamesW]

Bleach should work. I wouldn't use acid, as it could (further) damage the coping.

The spot looks particularly porous, which might explain why only that spot got the moss, algae, or mold or whatever it is. The coping was probably damaged at some point.

 

[FLNewsGuy]

It's actually at a few points around the pool ledge. But it's spotty, not continuous


Thanks all!