Folks-
I am not at all sure how to post values from a spread sheet but last summer when my PB was calling into question my testing efficacy -to include the veracity of the mighty TF-100, I did a little experiment. I tested the same exact sample of water at 4 other local pool stores -all within 1.5 hours of sample collection just to see how much variability there is among the different testing methods. Once collected and recorded I identified statistical outliers from the other testing methods. The tests ranged from my TF-100, to a Taylor kit, to BioGaurd -Strip Reader, to WaterLink Express to an unnamed Strip evaluation.
Net net, the TF-100 did a great job, with only the CH being slightly out of whack (+10%) from the others.
Here's the data, maybe someone knows how to make this present better?
Testing Source Self Carlton WC Anthony/ Sylvan Elam Pools WC Aquavita Pools Raw Average Average (minus outliers)
Date 06/06/09 06/06/09 06/06/09 06/06/09 06/06/09
Free CL 4 5 4.3 4 4 4.26 4.08
Combined CL 0.2 0 0.1 0.1 0 0.08 0.08
Total CL 4.2 5 4.4 4.1 4 4.34 4.18
pH 7.2 6.6 7.4 7.2 7.2 7.12 7.25
Total Alkalinity 70 59 40 90 80 67.8 69.67
Calcium Hardness 440 400 360 410 400 402 403.33
CYA 30 150 15 35 40 54 30
Temp 78 78 N/A N/A N/A 78 78
Salt 3300 3300 N/A 3100 N/A 3233.33 3300
Test Method TF-100 BioGaurd -Strip Reader WaterLink Express Taylor Reagents -full battery Strip evaluation
I thought it was interesting, maybe you will too.
Dan
I am not at all sure how to post values from a spread sheet but last summer when my PB was calling into question my testing efficacy -to include the veracity of the mighty TF-100, I did a little experiment. I tested the same exact sample of water at 4 other local pool stores -all within 1.5 hours of sample collection just to see how much variability there is among the different testing methods. Once collected and recorded I identified statistical outliers from the other testing methods. The tests ranged from my TF-100, to a Taylor kit, to BioGaurd -Strip Reader, to WaterLink Express to an unnamed Strip evaluation.
Net net, the TF-100 did a great job, with only the CH being slightly out of whack (+10%) from the others.
Here's the data, maybe someone knows how to make this present better?
Testing Source Self Carlton WC Anthony/ Sylvan Elam Pools WC Aquavita Pools Raw Average Average (minus outliers)
Date 06/06/09 06/06/09 06/06/09 06/06/09 06/06/09
Free CL 4 5 4.3 4 4 4.26 4.08
Combined CL 0.2 0 0.1 0.1 0 0.08 0.08
Total CL 4.2 5 4.4 4.1 4 4.34 4.18
pH 7.2 6.6 7.4 7.2 7.2 7.12 7.25
Total Alkalinity 70 59 40 90 80 67.8 69.67
Calcium Hardness 440 400 360 410 400 402 403.33
CYA 30 150 15 35 40 54 30
Temp 78 78 N/A N/A N/A 78 78
Salt 3300 3300 N/A 3100 N/A 3233.33 3300
Test Method TF-100 BioGaurd -Strip Reader WaterLink Express Taylor Reagents -full battery Strip evaluation
I thought it was interesting, maybe you will too.
Dan
