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

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".

for the uninformed: https://www.youtube.com/watch?v=7bBY1ZFifNQ

wow. okay 

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

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