Strange white film - out of nowhere

[bbshopplf]

Saltwater pool, about 40Kgal

Opened a few days ago - not too dirty; chemistry wasn't bad at all. Shocked it.

Next day, had cleared up nicely; swept and vacuumed. Added salt to get to 3000.

Next day, all was well; turned on the chlorine generator.

Today, all is well, water clear; chemistry is great (Hardness 250, TC 3, FC 3, pH 7.2, Ttl Alk 80, Cya Acid 30-50).

Turned on heater. At 1pm, 56 deg. At 6pm, 71 deg and rising.

And now I have a thin, white film on the surface.

???



Any help is appreciated.

 

[pooldv]

Welcome to TFP!

Is it foamy? It looks like foam from algaecide.

 

[bbshopplf]

Hi; thank you!

It was not foamy.

It did go away a day later. As the heat was the sole "new" thing I changed, I have to believe it came from that.

I guess I wasn't paying attention to weather, either, but as I say it's crystal clear now, and it was just a day after posting.

Thanks for the reply!

 

[samt]

Looks like pollen. Do you have film of pollen on your car or outside table?