This is in response to questions on my Substack chat.
It has not rained for months so the pool level is dropping but it is even more difficult for newly made pools which need filling. Roof water is normally the best choice but without that, which is the second best option?
Using a commercial phosphate filter is an option, at considerable expense, but it can have problems and is not considered here - but this may be a topic for a future film.
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