Pre pool opening (white water mold)

Star Wars Disney Plus GIF by Disney+
 
We all know I panic easily …. But this does seem suspicious (attached photos)

Chems are good
Fc 6
Cc 0
Cya 30 or 40 depending on if the sun is shining when I test
Ph (my never ending battle) 8 adding ma after this post
TA 125

Last few days I’ve had slimy gray stuff in the skimmer -around the back of the bowl, today is the first I’ve seen this “broken oil” looking stuff . If the sun hits it right it’s almost prism/rainbow effect

Water is CLEAR and cold
My panic button screams “biofilm”
As during the wwm battle I had a huge blob of that, that moved with the water around the pool surface

Thoughts? The paper towel pic is what comes out if I just lightly skim the water in the skimmer IMG_1050.jpegIMG_1049.pngIMG_1048.jpeg
 
Could be stuff that has blown in from a nearby fire or construction site, farm etc.
the pool is like a giant filter for the environment unfortunately. You may or may not notice similar debris on other outdoor surfaces.
If you have an auto cover (I don’t recall) it may be from the tracks.
Are just opening the pool? Do an
Overnight Chlorine Loss Test
 
As during the wwm battle I had a huge blob of that, that moved with the water around the pool surface
IMO it was 2 unrelated things last year. Several with autocovers have the oil / skimmer slick. We've never nailed the cause down.

Deploy a new 3 pack of tennis balls.
 
Auto cover - yes
Debris - yes (pollen, cotton wood etc)
I will oclt tonight- sailing was so smooth I’d forgotten abt this HAHA

That being said the pool has hardly even been open - just long enough to test and run fountains . Maybe 10 min 3 times per week so far
Ty
 
That being said the pool has hardly even been open - just long enough to test and run fountains . Maybe 10 min 3 times per week so far
A pool has to breathe more.

Bottling up the water is not good for it.

Leave the cover open at least an hour two or three times a week.
 
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