Re: Concrete pool - Black spots (Maybe Algae) ??? Need Help
It depends on your tested CYA level. See: http://poolsolutions.com/gd/best-gue...e-chart.html#a
Read it and focus then on the Best Guess Chart.
I know you have a K- 2006 and have been around the block. So you must know that if your CYA is in the high end of the range, bump the shock level FC accordingly.
If you need help, report your CYA. We will be happy to help with mor specific recommendations!
Best wishes
Last edited by FormerBromineUser; 06-21-2015 at 02:21 AM.
26K gal 20x40 rectangular IG vinyl pool; Apr 2014: New pump, liner, auto-cover, & water; Pentair Whisperflo 1HP pump; Pentair Trition sand filter; Cover/Star CS-500 auto cover; Taylor K-2006C; OTO
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