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We use a special pool deck and sauna cleaner to remove scum lines. It smells like ginger ale and cleans pretty good, but there are some permanent marks that I can't get off no mater how hard/long I scrub it. Is there some tricks to remove this? What do you use to clean your scum lines and how...

Since my pool is public, I have to test (FC & PH) every 2 hours. TC once a day and Total Alkalinity once a week (i do this twice). CYA is not applicable since it is unstabilized indoor pool. I do Calcium Hardness test and calculate Saturation Index just because I know what it is, but it is not...

I have this problem :( for the past couple of weeks and it seems that it is escalating very rapidly. Basically my pool chemistry is as usual. Today's readings are: FC=2.5; PH=7.2; Alkalinity=100; Calcium Hardness=270; Saturation Index=-0.2. The pool is clean, but not very welcoming due to cloudy...

My first swimming pool maintenance experience was back in 2013 when I worked as a superintendent. It was a small, outdoor pool right under the old trees. That pool required at least couple hours to prepare it for opening. Chemical balance was hard to maintain, so after I switched jobs, old...