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Post by houpla on Aug 13, 2022 16:34:14 GMT 1
That's strange, never noticed before that there's no section for pools! Could anyone who uses 9% eau de javel to disinfect their pool please confirm the quantity used per m3 of water? Do you use the same quantity to choc it as you do for regular maintenance? Teapot did give me this info years ago, but I've mislaid it and I'd rather not guess  TIA |
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exile
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Massif Central
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Post by exile on Aug 13, 2022 18:00:58 GMT 1
It is a bit of an open ended question because it depends (in part only) on the chlorine levels in your water before dosage.
It also depends a bit on what sort of pool. I have a temporary pool which is taken down each autumn - so I am not very interested in the overall pool chemistry because any imbalances go down the drain.
FWIW I add 5-7l for 20m3 water when the chlorine levels are off the bottom of the scale on the simple test I use. After 24 hours I test for chlorine again and redose if necessary.
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Post by jackie on Aug 13, 2022 20:12:12 GMT 1
Wish we had a swimming pool. Would be using it to water the veggies….in one of the wettest regions of France.😢
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exile
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Massif Central
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Post by exile on Aug 13, 2022 20:45:05 GMT 1
I could not have one now. 6 weeks ago I was allowed a first filling of a pool only (it was already installed and full) but no topping up.
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Post by houpla on Aug 13, 2022 22:08:13 GMT 1
Thanks, exile. Apparently the reading for free chlorine is around zero, which I can well believe given the incessant sunshine recently. The irony is that I wanted a pale-green pool, not a bright turquoise horror, and the only time it's how I envisaged it is when it's on the slippery slope to algae-hood In theory it will be getting topped up by the rain (remember that?) forecast from tonight onwards. |
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exile
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Massif Central
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Post by exile on Aug 13, 2022 22:40:50 GMT 1
Well despite my efforts with chlorine levels ours too is green. I have added anti algues which reduced the green colour for around 12 hours.
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Post by hal on Aug 14, 2022 10:51:39 GMT 1
I miss the pool forum, but for the wrong reasons - the banter that it created! The resident expert Teapot, a brilliant water expert, was not good at communication and ended up winding everyone up, which was fun, but not condusive to (is it to or for?)the subject. I learnt a lot from him and managed to retain most of it.
Houpla, your problem. What size is the pool and what are the readings? Do you use dip strips or a proper tester. Strips are iseless, but give an indication. I urge you to get a tester. I suggest a Scuba2…
You say your FC is zero. Do not delay - throw in a few jugs of javel. You cannot over dose, so to start just get some in the water.
Then do some measuremys of TC, FC and importantly, CYA (cyanauric Acid) and post the readings.
But immediatly, please get some javel in there - five litres even.
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Post by pcpa on Aug 14, 2022 11:06:29 GMT 1
Houpla and Hal. Do either of you have up to date contact details for Teapot/Théière? A friend, someone you know Hal (who said he was one of the few guys who actually understood the subject) asked me for his E-mail address but his message to him bounced. He helped me out a lot and phoned me immediately offering help when he learned I was hospitalised with Sepsis, knowing that he was a cancer survivor I sincerely hope he is OK, if either of you have any news I would appreciate it. I think my friend tried the phone number I had as well but can't recall.
Was there a seperate pool forum or were you talking about Total France?
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Post by hal on Aug 14, 2022 12:22:14 GMT 1
I think I might have had his email once, but much water under the bridge now, I cannot remember his name even, so do not know where to look.
He has not been in the new forum, but an ‘Anthony’ has popped up now and then claiming to be his friend, but I think it is he with a new name.
To illustrate how far away I am, I knew not he had cancer nor you sepis I hope you both are all clear now.
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Post by pcpa on Aug 14, 2022 15:30:29 GMT 1
I am thanks and I think his cancer was several years back, he spoke of it in the past and of being a survivor.
Update, I have just got through to him on the phone, he is fine and well and working full time (and some) in the UK.
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Post by houpla on Aug 14, 2022 16:03:36 GMT 1
Houpla, your problem. What size is the pool and what are the readings? Do you use dip strips or a proper tester. Strips are iseless, but give an indication. I urge you to get a tester. I suggest a Scuba2… You say your FC is zero. Do not delay - throw in a few jugs of javel. You cannot over dose, so to start just get some in the water. Then do some measuremys of TC, FC and importantly, CYA (cyanauric Acid) and post the readings. But immediatly, please get some javel in there - five litres even. 90m3, OH uses a Palintest photometer. Um I'm not sure I agree with the bit about 'You cannot over dose', but that's why I asked the question, to try to get an accurate answer. He has dosed it with javel and it has worked. The higher alkilinity as a result of the javel should be offset by the lowering effect of the first rain we've had in 7 weeks (the Ph always goes down after rain) but he'll test again soon and I'll let you know the results. What I'm after, though, is a more accurate formula. Perhaps it's a 'how long is a piece of string' question, depending on the water balance and severity of the green lurgy? |
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Post by hal on Aug 14, 2022 18:38:32 GMT 1
At 11.00 yesterday you had a FC of zero and on a slippery slope to green. 17.00 today, you have treated it with javel and it has improved. My bit about not being able to overdose was to get you out of panic mode and just get some stuff in there. You do not say how much you put in, but I imagine a fair bit for such a quick result, and iff too much no real harm done. Now you are out of the danger zone, you can concentrate on the overall balance. I urge you to look at the CYA as a priority. As for the formula, yes. For my pool at my Gites, about the same size as yours WITH a salt water generator topped up with a UV light and a javel doser, this has worked for me for several years: Total Chlorine........ 4 - 6ppm. Gauged by the intensity of sun and people using pool adjusted by increasing/decreasing amount of javel injected. This can only be trial and error, but after a while I get a 'feel' for it. Free Chlorine ........ no more than 0.5ppm below the TC level. pH.......................... 7 - 8.2. usually on the high side as the water is constantly oxygenated. Alkalinity................ 80 - 100. when 100 is reached, a small jug of HCl is thrown in. CYA....................... 60 - 70 very little variance as I do not use any chlorine with added CYA, reduces throughout summer due to dilution, but a small cap of stabilisre. Salt........................3200ppm Try this for quantities… www.troublefreepool.com/calc.htmlHope it helps. |
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Post by houpla on Aug 14, 2022 21:27:03 GMT 1
Thanks, hal. I wasn't panicking We both know what to do, but in the interests of intelligence and economy I was trying to establish the correct dosage. I'll pass on the site linked to, if you don't mind. I don't speak American  The biggest problem AFAIC is persuading OH that there are pro's that know what they're talking about, willing to share their knowledge, and that it's worth taking their advice! Any takers for a second-hand mari, tall, dark and handsome but incurably 'M. Je-sais-tout' and with a twisted logic to take one's breath away  |
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TIA
