Still says you have to maintain a sanitizer. So if you have to add chlorine, what is the point? I would put this in the US[\s] UV or ozone category where there is generally no advantage and just added expense in a residential outdoor pool.
Higher dissolved oxygen (DO) levels with chlorine and UV will result in a slight increase in oxygen radical formation which can act as a disinfectant and oxidizer.
One good reason not to do it - metal corrosion is dominated by two factors, pH and dissolved oxygen content. If you lower pH and have high DO levels, metal corrosion is much more likely.
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