Loose green algae settling on bottom

[Dave31410]

FC 8
CC 0
pH 7.2
CYA 40
I am getting a good bit of loose green algae on the bottom. I know my CYA is low and am working on that. The water is clear. Is this dead algae? If not how is it forming if the FC level is adequate?

 

[JamesW]

Maybe Mustard Algae.

Pictures?

Is there any yellow or brown coloring in the algae?

In any case, a full SLAM is called for.

SLAM Process

 

[JJ_Tex]

With algae, I would not be adding CYA.

Have you done an OCLT, to make sure it is algae and not pollen?
If it is algae, you need to SLAM. Once that is done, then you can worry about bumping up your CYA to the recommended levels.

 

[JamesW]

You seem to have a recurrent problem with algae, which indicates a lack of sufficient chlorine.

You need to increase the FC and maintain it at a level sufficient to keep the pool clear and free of algae.

Dead algae?

This our 4th year with the pool. There seems to be a lot more dead algae on the bottom than in previous years. We have had a lot of rain which may be a factor. I have to run the robot almost every day to clean the bottom. The water is clear but not crystal clear. I have cleaned out the light...

www.troublefreepool.com

Small patches of algae on liner

I have been keeping the FC level around 5-7 (CYA 70) and the water is clear. Water temp is now 84 and I am getting some small green patches on the liner, mostly in a corner or transition between the sides and bottom. Is that just a matter of brushing? I think I have been negligent in that...

www.troublefreepool.com

Possible black algae?

I have read that it is not as likely on a vinyl surface but I think this is black algae. I brush it off and it reappears in the same spots a couple of days later. Water remains clear. Is any algaecide recommended or just more chlorine and brushing? FC 7 CC 0 PH 7.6 CYA 60

www.troublefreepool.com

Pool Care Basics

Overnight Chlorine Loss Test

SLAM Process

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Overnight Chlorine Loss Test