Fighting Algae for months

[jwhouse]

You're definitely getting there. Just keep that FC level up and with vigilance you will overcome the algae infestation. Can't say it enough though, keep that FREE CHLORINE level at shock levels as long as you can without letting it dip down toward the minimum CL levels for your pool. I believe your levels would be a shock level of 12 and a minimum of 2.
The longer your FC levels are below the shock level and the lower below that you allow it to go will determine how long/expensive getting rid of the algae will be.

[rkrgk]

Thanks Jwhouse.
So I added 4.26Gal of bleach again yesterday. I tested before adding the bleach and my FC was 0 (remember I had 4.0 ppm in the morning). CC was 1.0ppm
After adding Bleach and brushing
-------------------------------------
FC - 14
CC - 1.5
Tested this morning, I took only at 7:15 am, so sun was up for few minutes, but pool is at the north side of my house
------------------------
FC - 9
CC - 1

BTW, is CYA difficult to dissolve. I see mentions in posts about using a sock to put in front of the return?

[Watermom]

Keep hammering it with bleach and yes, you can put CYA in a sock in front of a return. If you squeeze the sock occasionally, it will dissolve faster.

[rkrgk]

Thanks Watermom! I will do that.
And checked the Cl level again (11:30 am) , its depleting very fast in sun.
FC - 3.0 (was 9.0 at 7:30 am)
CC - 1.0

[rkrgk]

I am not really sure what it is, but I am a bit freaked out about it now..
I was running my hands on the pool walls, and I can feel graininess. Its like when I run my fingers some small grainy/sandy substance comes out. When I look closely I can see white granules coming out of the wall as I run my fingers.
What is it? Is it calcification? or is it that some substance is corroding the walls and what is coming out is part of concrete?
There is also powdery substance at the bottom of the pool and the pool steps and when I brush they just come out and make the pool cloudier.

[Charlie_R]

I would think you would need to check your pH and Calcium hardness. It MIGHT be your plaster eroding. But I don't know.

[rkrgk]

My pH is 7.3 and CH - 400 (I tested 3 days ago). Can it be the plaster eroding?