FC burn rate?

[smooth2222]

15000 gallon fiberglass michigan

tf100
calcium 200
TA 80
PH 7.5
CYA 45

75 degrees 80% sun, what would be average ammount of FC loss by the sun for 1 day be?

water is crystal clear btw.

 

[Bama Rambler]

We usually try to get it down to about 2 ppm FC loss per day. Somewhere close to that is normal. With a CYA of 45 and in Mi you should be close to that.

If you're losing more than that, I'd suggest you run an OCLT to rule out organics eating it.

 

[JasonLion]

It is only possible to give you a rough estimate, as every pool is somewhat different. I would expect you to lose 40% to 65% of your starting FC level each day.

 

[Swampwoman]

Smooth, I'm in Michigan, and although this is my first season, I have recorded my FC each day: Generally lose between 1.5 and 2.5 per day when I'm running FC 4-6 range for 45 ppm CYA -- depending it seems, on swimmer load and sun...And whether or not one allows a guest with a dog, which will land you on the -2.5 ppm side

Most days, even the hottest ones like that scorcher Sunday of memorial weekend, I'm not using/losing more than 2 ppm, which is 33% of the 6 ppm at which I 'ride.' But I've also added 50 ppm borates, which buffers/reduces my chlorine load, and more importantly, makes water super silky feeling to swim in!