FC/CYA/Temperature relationship?
Florida. I have learned that my pool needs FC to be about 10% of CYA in summer to keep algae away. (FC=7 when CYA=70). If FC drops to 5 for even a few days, the pool starts to get a green tinge which I can quickly control. But now its October and the pool is about 10 degrees cooler. (I haven't measured the temp.) When I used a tri-chlor in-line feeder I dialed it back around this time of year.
My question is, should I expect to need a lower FC/CYA ratio with colder water to keep algae away? (My gut tells me that this is so). Of course there's also less sun on the pool and less of a bather load (which is always light). If I were to install solar heat, and raise the temperature back to where they were this summer will the FC/CYA ratio I need go back up?
In-ground gunite 16 x 30 13,000 gal. Full screen enclosure. 120 sq ft. Filter cartridge, 1-1/2 HP pump. Master Pools In-floor cleaner. Taylor K-2006.
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