Quart+ per day of chlorine?

[Arizonarob]

So I’ve noticed an up tick in chlorine use over the past month. I was running at 3 cups per day of 10% LC when my cya was at 80. (Start of the season) Now I’m using a quart plus of the same 10% with my cya at 60. Since April, I’ve burnt off 20 ppm of cya due to sun and fill water from evaporation. My question is, is this normal consumption of FC this time of the year in AZ? And, am I better off adding some cya back in to give the FC a little more sunscreen??
Thanks guys.

 

[Richard320]

Sounds normal. The days are longer and hotter. 32 ounces of 10% in 11,000 gallons is only 2.3 ppm per day. That's excellent.

I'd leave the CYA where it is so you have a little room to use pucks if you go anywhere this summer.

 

[Arizonarob]

Cool, thanks Rich.

 

[mknauss]

Your CYA is not lost due to evaporation. In our desert sun, we get oxidation of the CYA of up to 10-15 ppm per month during the summer.

My pool normally consumes right at 4 ppm of FC per day in June, July, and August.

 

[Arizonarob]

Marty, what happens to the cya when it oxidizes? Does it make it ineffective?

 

[mknauss]

Marty, what happens to the cya when it oxidizes? Does it make it ineffective?

It disappears. There is no real residue.

 

[Arizonarob]

Ok, I got it now. Thanks!