Not sure who you were responding to, but Richard explains it better than me for sure!
The primary reason for having CYA is to protect your FC from sunlight. If you get that much shade, you should be good keeping CYA lower.
Re: Is there a "correct" CYA?
Not sure who you were responding to, but Richard explains it better than me for sure!
The primary reason for having CYA is to protect your FC from sunlight. If you get that much shade, you should be good keeping CYA lower.
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
Re: Is there a "correct" CYA?
Yes, higher CYA with proportionately higher FC to prevent algae growth results in a lower absolute FC loss per day. However, it doesn't sound like you get full sun all day long so your losses are probably already reasonable so you probably don't need to go above 50 ppm CYA.
15.5'x32' rectangle 16K gal IG concrete pool; 12.5% chlorinating liquid by hand; Jandy CL340 cartridge filter; Pentair Intelliflo VF pump; 8hrs; Taylor K-2006 and TFTestkits TF-100; utility water; summer: automatic; winter: automatic; ; PF:7.5
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