White film on top of pool

Jer34

Active member
Jun 25, 2021
25
Stoney Creek, ON
Pool Size
50000
Surface
Vinyl
Chlorine
Salt Water Generator
SWG Type
Hayward Salt & Swim 3C
Just opened the pool a couple of days ago, algae has started to clear. But when I got home from work today there is a white film floating on top of the water which I’m not sure what it is. Had the water tested 2 days ago at the local pool store, salt level was low so added another 70lbs of salt as per the test. Just used test strips now:
PH a bit low at 7
FC 3
Total Alkalinity 80
Stabilizer 30-50
Wondering if anyone has an idea of what is causing the film?
Picture below but it is a bit difficult to see

EDIT:
I had the SWG on fairly high, turned it down to low right before this post and the film cleared within 10 mins. Problem with the SWG? Or just too high of an input?
 

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Last edited:

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
47,887
Laughlin, NV
Pool Size
6000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
That is seen in the spring with cold water and certain pool water chemistry. It always goes away once the water warms.

Get yourself a proper test kit.
 
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