For those of you using Bleach...

[Dr. Spike]

I lose about 0.25 to 0.5 PPM per day, my CYA is less than 20 (pool store tested it a while back at 17, but not 100% sure I trust their numbers, it started at 0, I used pucks for about two weeks before I became "enlightened" ).

My pool gets 0% UV exposure. It is indoors. I do not get leaves in my pool, but I do get a few centipedes, earwigs and spiders, although the spiders tend to keep on the walls trying to catch the other two.

When I have heavy bather loads I can lose 1 to 1.5 PPM in a day.

I suppose I don't count though.

[CToon]

Our pool - 50 cya , 1 ppm a day

[stualden]

I'm just like you - CYA at 40, started using bleach this year. (I've been using pucks for 12 years, though, so for me, clearly something always eats CYA over the winter.) I seem to need a 3-quart jug of bleach every two days, so by my calculations I'm losing about .7 ppm per day.

Pool is in full sun for about 5-6 hours a day. Bather load is very light, but leaves, etc. are probably worse than most people's.

[joliecharlie]

50 CYA, holds chlorine overnight but loses 5-7ppm on hot sunny days. Full sun 9am-6pm, no shade, little debris, light swimmer load. I am running pucks again in autochlorinator set on 1/2, test chlorine nightly and add accordingly.
18x26 inground vinyl

[vanhout]

Excellent thread,

<30 CYA, 2 - 3 ppm / day

[graciec]

Dr Spike...this is off topic...So excited to see you have a dome!!!!! how do you like your dome?
We are in Michigan and I want one!!!!!! If they move this question off this board, can I ask you on the off topic board??

[medvampire]

Full sun 8 hours day. Loose about 2 to 3 ppm each day. Add 1 qt one day 2 qt the next. CYA 35 to 40 ppm.
Steve

[jmjbj_h]

My CYA is 45 and I am losing about 2-3ppm a day. Full sun and medium/heavy bather load. Mostly several kids under 6. Can anyone say...toilet? I put in a bottle a day

Joe

[Dr. Spike]

Dr Spike...this is off topic...So excited to see you have a dome!!!!! how do you like your dome?
We are in Michigan and I want one!!!!!! If they move this question off this board, can I ask you on the off topic board??

Graciec,

I do like the dome, we should move the dome discussion to the off topic forum and not hijack this thread.

[chem geek]

The answer to your question is a function of both CYA and FC (total free chlorine) levels since twice the chlorine level loses about twice the amount of chlorine per day. I now have around 15 CYA and 2-3 ppm FC and lose about 0.5 ppm per day. The pool is normally covered and is open to sunlight (it's an outdoor pool) about 14 hours per week. I used to have more CYA, but had more chlorine and the rate of loss was about the same.