cfherrman
TFP Guide
I believe Taylor's official number is 1 drop or 10%
Normal losses of 2-4 ppm are considered normal
Normal losses of 2-4 ppm are considered normal
I recall your question to this issue a while back as noted here: SLAM - the math AND the reality. So when the FC is exceptionally high, the OCLT can be a bit more trickier.
But to answer your main question about above FC loss when the SWG is off ...... it's hard to pinpoint. Much depends on the amount of sunlight, junk that might blow in the pool, etc. Once a SLAM is completed, the FC should drop much faster (initially) from that elevated SLAM level as it tries to get back to its ideal target range. As an example, your post SLAM day 1 FC drop might be 6-8 ppm, then day 2 only 4-6, etc until the FC gets closer to its normal range where it should lose no more than 4 ppm in 24 hrs. But again, even in that example, it's hard for us to know for sure based on varying local factors that could impact FC loss.
Maybe someone else who is better at crunching numbers will have another thought or two to help.
I’m lost. What FC measurement uncertainty?
Do you have any water features in your pool? Descents, fountains, bubblers, etc?So pretty frustrating.
...but not so high as it takes ages to drop down to a swim level after I get back.
Do you have any water features in your pool? Descents, fountains, bubblers, etc?
I do not know. In summer it stays even at 52% , running 6.5 hours (10am to 4.30pm)What FC does your SWCG generate each day? It needs to add what you lose. So most likely 4 ppm or so.