Stubborn Algae

[pooldv]

If your CC is less than 0.5 ppm, the OCLT is 1 ppm or less, the water is clear and algae free then the SLAM is complete and you can resume normal pool maintenance.

 

[chem geek]

What really troubles me is that I've had algae before, but it always went away with little effort. This stuff is Odd! Usually I had to brush the pool because it was sticking to the sides and bottom. This stuff is like "dust" that settles and becomes "airborne" with only a kick of the feet or a simple brooming. Its not really "stuck", its just settled.

Is it yellow or mustard in color (note that against a blue pool surface yellow can look green)? Is it mostly on the shadier side of the pool? Since it is already dust-like from your description, if the other two questions answer as true then this may be yellow/mustard algae.

 

[GypsmJim]

Is it yellow or mustard in color (note that against a blue pool surface yellow can look green)? Is it mostly on the shadier side of the pool? Since it is already dust-like from your description, if the other two questions answer as true then this may be yellow/mustard algae.

Before the slam is WAS in the shadier spots of the pool. Now, its just in the center, where it is 100% sunlight. It's "loose" in that it collects there due to the circular motion caused by the filter. It looks green to me. Its very fine. I have a battery operated pool vacuum that is very effective at removing dead bugs and other solids that also accumulate in the center. When I use this the green settlement is gone, but there is nothing collected in the vacuum's filter bag, and it collects again after a few hours of Filter operation.

So, early in the year I had a lot of pollen in the yard, but this late in the season that all seems to be gone.

 

[pooldv]

Can you put a skimmer sock or pantyhose in your vac to try to catch finer debris?

 

[GypsmJim]

Can you put a skimmer sock or pantyhose in your vac to try to catch finer debris?

That's what's in there now...