I have two CYA bottles, Leslie's and TF100.
The difference in readings is about 10ppm
Leslie's 35-40
TF100 25-30
(I completely forgot I had the same issue last year, only then the readings were 60 and 40)
My TF1000 is from 2017 (authorized ebay seller) and I believe Leslie's is from the same year. Leslie's is from the same bottle they use to test water.
Which reading is more accurate? What's the shelf life of R0013 and how older product affects the reading?
The reason for my concern - my FC loss during cloudy day is 4-4.5ppm. I add chlorine at night, bringing it up to 6ppm, have 5.5ppm in the morning and 1.5-2ppm at night
Thanks.
P.S. My test kits are kept in TF100 shipping box, with room temperature 60-75 (non air conditioned room, so in the summer it may get slightly above 75)
The difference in readings is about 10ppm
Leslie's 35-40
TF100 25-30
(I completely forgot I had the same issue last year, only then the readings were 60 and 40)
My TF1000 is from 2017 (authorized ebay seller) and I believe Leslie's is from the same year. Leslie's is from the same bottle they use to test water.
Which reading is more accurate? What's the shelf life of R0013 and how older product affects the reading?
The reason for my concern - my FC loss during cloudy day is 4-4.5ppm. I add chlorine at night, bringing it up to 6ppm, have 5.5ppm in the morning and 1.5-2ppm at night
Thanks.
P.S. My test kits are kept in TF100 shipping box, with room temperature 60-75 (non air conditioned room, so in the summer it may get slightly above 75)
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