For those of you using Bleach...

[leejp]

How much (in PPM) does your pool consume each day? And at what CYA?

I know it varies by weather, amount of sun exposure, use of the pool, stuff falling into the pool... but if enough folks respond, maybe we can get a starting point rule of thumb for those like me converting to the BBB method.

This is my first year on Bleach (actually, I used tri-chlor until my CYA got to 40 then switched to Bleach). I've also had to go through an iron stain removal procedure (unfortunately 2x) and have yet to "zero in" on my pool's bleach consumption.

Here's my highly unscientific data collection as of today. Latest #'s. I took vanhout's suggestion and changes the title of the post (hope it'll take). keep those #'s coming...

[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??

[vanhout]

Excellent thread,

<30 CYA, 2 - 3 ppm / day

Update for your chart, which is awesome.

36,000 gallons IG vinyl, full sun, medium bather load

[PaulLovesJamie]

24' AG (approx 15,000 gal), CYA 25, full sun all day. Averaging 1 or 2 ppm per day, but the hot sunny days when the boys are in the pool all day requires 3 ppm. Moderate swimming load - somebody usually goes in every day.

[milynor]

Great thread!! I/G Plaster 22,000 gal outside the Motor City. 10 hours direct sunlight, CYA 30, medium bather load, lose about 2ppm per day.