Algae on the water line

[amgclk65]

Hello,
I've noticed Alega on the water line this summer. Or I think its algae. The water is nice and clear. I did raise the water level . I dont think that has any effect on it. Here is some pictures for analyzing. Any help would be awesome.
FC: 4.5
CC: 0-0.5
Ph 7.6
Alk 130
calcium 550

 

[Mdragger88]

What is your cya level?
Visible algae requires SLAM Process

 

[Richard320]

The FC reading is meaningless without knowing the CYA value.

A little algae here and there at the water line (like maybe in the skimmer throat only) can be cleaned up with a brush and running a higher than needed FC level. If it's more widespread, SLAM it.

 

[amgclk65]

65 cya, a little low for a salt pool. Granted I did check the chlorine loss over night and was inspec.

 

[amgclk65]

@Richard320
The algae is roughly on 35% of the water line. I did spray bleach and scrubbed the tile line and that did remove it for a few weeks.

 

[mknauss]

It appears your waterline is on the plaster portion of your pool? No water line tile?

Be careful on your FC. You are riding near your minimum FC for a CYA of 70.

 

[amgclk65]

@mknauss,
Here is the tile line on the pool. The back side of the pool has no tile. All plaster, which I was told is a bad thing. The picture upload service is jacking up the picture orientation.

 

[mknauss]

Without tile you will fight algae and potentially scale at and above your waterline. So brush, brush, brush. Not much you can do about it until you remodel the pool and add water line tile.

 

[amgclk65]

@mknauss
okay, Ill get my lazy butt brushing more often. I should've stated in my title , Algea above the water line. If that changes anything. So raise my FC for my CYA and brush more often. As far as Slamming, Not needed at this point? Due to the pool design.

 

[mknauss]

I doubt a SLAM would do anything. It is water being wicked up the plaster. That area has no FC left as it is driven off very quickly and you get algae. Really poor pool design.

 

[amgclk65]

I noticed the water line that has more sun exposure does not get Alega build up. Wicked up water is evaporating quickly in that area. Now the portion of the pool that has a tile line is also getting Alega build up. Would that be a different issue?

 

[mknauss]

Along the tile or in the grout lines.

I would suspect the sun dries out the water quickly. That will be where you get scale build up quicker.

 

[amgclk65]

Its on the grout lines and a bit of the actually tile .

 

[mknauss]

Grout line is just like the plaster, the water wicks up it. On the tile is odd, but just a case of needing to be brushed more often. Get a scrubber and run the waterline once a week when you are in the pool.