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greenbone

176 posts

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#210432 27-Mar-2017 11:51
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looking to install a small natural pool

 

 

 

 

 

 

anyone had experience? any recommended auckland-based companies?

 

 

 

 

 

thanks

 

 

 

gb


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kingdragonfly
9386 posts

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  #1748638 27-Mar-2017 12:26
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From https://www.sciencedaily.com/releases/2013/08/130808092053.htm

"The use of natural pools -- those that do not use chlorine or other chemical disinfection products -- has seen an upward trend in recent years. Now, scientists from the University of Barcelona have discovered faecal contamination in some pools due to droppings from birds and other animals. As such, they recommend investigating the scope of the problem and determining the microbiological parameters that would ensure that people can bathe healthily.

Researchers at the University of Barcelona (Spain) have analysed four natural swimming pools in Catalonia to test the water quality in these artificial water bodies, which are treated with mechanical and biological filters -- with plants, for example -- but not chemical ones.

The results show that three of these pools exceeded the recommended limits for Escherichia coli and faecal enterococci, as published in the 'International Journal of Hygiene and Environmental Health'.

As Arnau Casanovas, one of the authors, said: "Demand for this kind of swimming pool has increased Europe-wide because of the problems chlorine can cause in conventional swimming pools, such as irritation to the eyes and skin, but we know little about the capacity of natural purification systems to guarantee the quality of bathing water from a microbiological perspective."

The scientists set about this study in order to put this to the test. As there is no legislation regulating water quality in these pools, the researchers compared their data with the recommendations given in France, Switzerland, Austria and Germany. These are countries where it is common to build these pseudonatural water installations in landscaped areas.

According to European experts, the values that should not be exceeded are 100 'colony-forming units' (CFU) of E. coli per 100 ml of water, and 40-50 CFU of enterococci, but in three of the swimming pools these values were exceeded. The microbiological contamination of this water could have originated from bathers themselves by unintentional washing of faecal remains or other natural matter from users, but the biochemical analyses reveal that in this case it was of animal origin.

"The source of contamination is probably the wildlife, particularly birds, that live near these swimming pools," comments Casanovas, who also notes that other parameters, such as the concentration of the bacterium Pseudomonas aeruginosa, were acceptable."

 
 
 

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neb

neb
9376 posts

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  #1748687 27-Mar-2017 13:36
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I didn't look at the original photo too closely and thought it was a decorative pool (based on the plants and whatnot), not a swimming pool. Oh gawd no, something like that without chemical or similar antibacterial/antifungal measures isn't a pool, its a petri dish. If you're really worried about chlorine, use ozone + UV or something similar.

afe66
3151 posts

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  #1748710 27-Mar-2017 14:14
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Don't worry, just get Nick Smith to raise the allowable faecal contamination threshold, problem solved.

(just like the rivers)



greenbone

176 posts

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  #1748740 27-Mar-2017 15:10
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lmao. im surprised some of you even leave the house for work in the morning, its way too risky to go outside

 

these things have been around for years. its not a hole in the ground filled with stagnant water

 

but you need to know what youre doing, hence this thread


cadman
1014 posts

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  #1748742 27-Mar-2017 15:12
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kingdragonfly: ...discovered faecal contamination in some pools due to droppings from birds and other animals... three of these pools exceeded the recommended limits for Escherichia coli and faecal enterococci...

 

But that's all "organic" and "natural" so it must be very healthy and good for you. No nasty "chemicals".


greenbone

176 posts

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  #1748876 27-Mar-2017 18:12
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greenbone

176 posts

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  #1748920 27-Mar-2017 19:24
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wow. okay sealed

 

 

 

you should save that response, with it you can debunk anything you disagree with on the internet, its rock-solid

 

 

 

any reasonable and informed persons under 65 who have had experience with this type of build, would appreciate hearing from you

 

 


greenbone

176 posts

Master Geek


  #1748928 27-Mar-2017 19:40
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kingdragonfly: From https://www.sciencedaily.com/releases/2013/08/130808092053.htm

"The use of natural pools -- those that do not use chlorine or other chemical disinfection products -- has seen an upward trend in recent years. Now, scientists from the University of Barcelona have discovered faecal contamination in some pools due to droppings from birds and other animals. As such, they recommend investigating the scope of the problem and determining the microbiological parameters that would ensure that people can bathe healthily.

Researchers at the University of Barcelona (Spain) have analysed four natural swimming pools in Catalonia to test the water quality in these artificial water bodies, which are treated with mechanical and biological filters -- with plants, for example -- but not chemical ones.

The results show that three of these pools exceeded the recommended limits for Escherichia coli and faecal enterococci, as published in the 'International Journal of Hygiene and Environmental Health'.

As Arnau Casanovas, one of the authors, said: "Demand for this kind of swimming pool has increased Europe-wide because of the problems chlorine can cause in conventional swimming pools, such as irritation to the eyes and skin, but we know little about the capacity of natural purification systems to guarantee the quality of bathing water from a microbiological perspective."

The scientists set about this study in order to put this to the test. As there is no legislation regulating water quality in these pools, the researchers compared their data with the recommendations given in France, Switzerland, Austria and Germany. These are countries where it is common to build these pseudonatural water installations in landscaped areas.

According to European experts, the values that should not be exceeded are 100 'colony-forming units' (CFU) of E. coli per 100 ml of water, and 40-50 CFU of enterococci, but in three of the swimming pools these values were exceeded. The microbiological contamination of this water could have originated from bathers themselves by unintentional washing of faecal remains or other natural matter from users, but the biochemical analyses reveal that in this case it was of animal origin.

"The source of contamination is probably the wildlife, particularly birds, that live near these swimming pools," comments Casanovas, who also notes that other parameters, such as the concentration of the bacterium Pseudomonas aeruginosa, were acceptable."

 

 

 

3 pools exceed 100 ppml (doesnt actually say by how much, we allow 500 ppml in our swimmable water now) out of 4 (four) pools tested ... in one region of spain ... and means the 20, 000 other natural pools installed in europe are hazardous? what is this


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