Water temp to Cl correlation

[scuba]

Hi there! New to the forum. Does an increase in water temp reduce the Cl levels typically? Asking because I noticed a drop in Cl level as water temp recently went up from the low 80's to 90F. Salt cell at 50% was maintaining 1-3 ppm, not anymore. Thanks.

[PoolDoc]

As far as I know, temp alone does not. But the sunlight associated with those increases will.

Of course, I don't know what effect temp has on the cell itself.

Ben

[chem geek]

There is usually a higher chlorine demand, even without sunlight, when the temperature is higher. Higher temps make all reactions of chlorine go faster, including chlorine reacting with organics in the pool, with pool covers, with pool surfaces and equipment, and with chlorine outgassing to the air. And yes, if there is more sunlight on the pool that that increases chlorine demand as well. With a higher chlorine demand and not changing the SWCG output (% on-time), the FC level will drop.

[scuba]

Makes sense, thanks. I will raise the cell setting and monitor.