Surprised to find this forum by chance,thought id look in,b been at it 26years ups and downs, having hip op in fortnight,i am old school traditional got to have2-3montha off so looking into pole systems seem pricy,do these machines!!/ Pumps?convert water from tap to filtered or r they just pumps and do u require any other fluids/ chemical s, save me the ladder work for awhile,whats the cheapest but adaquate thing to go for any info would b appreciated PS,been a good year 4it still dry/warm for time ,thanks jolly .