First test with TF-100

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amentowasso

amentowasso

Member
Aug 5, 2024
16
Broken Arrow, OK
Pool Size
10000
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
Hayward Turbo Cell (T-CELL-5)
Just completed my first test with the TF-100. Thoughts?

Pool looks good, but the filter seems to be getting clogged pretty quickly. Was previously using test strips (2 month old pool) but switched to the TF-100 after joining here.

Still trying to figure out the Water Math app, so hopefully I did everything correctly.
 

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A few quick questions:
- Are you sure about that FC test? Did you use a 10 ml water sample size then add just one generous scoop of powder? Then mix until clear and divide the result in half? Example: 20 drops to clear equals an FC of 10.
- The TA test is in 10 ml increments. After you add the 5 drops of R-0008 (green), you add the R-0009 until the solution turns something like a Barbie pink. Each drop is 10, so once that color no longer changes, you've hit the final result (70, 80, 90, etc).
- If your FC is indeed over 10, the pH test will be skewed and appear high. Best to let the FC fall below 10 before trying to test and adjust the pH.
 
Texas Splash said:
A few quick questions:
- Are you sure about that FC test? Did you use a 10 ml water sample size then add just one generous scoop of powder? Then mix until clear and divide the result in half? Example: 20 drops to clear equals an FC of 10.
- The TA test is in 10 ml increments. After you add the 5 drops of R-0008 (green), you add the R-0009 until the solution turns something like a Barbie pink. Each drop is 10, so once that color no longer changes, you've hit the final result (70, 80, 90, etc).
- If your FC is indeed over 10, the pH test will be skewed and appear high. Best to let the FC fall below 10 before trying to test and adjust the pH.
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No. Not confident in the FC test at all. I followed the instructions and it took 89 drops to turn clear. Added the drops to test for CC and it stayed clear.

The TA test should be 70. I multiplied NY 11, not 10. Read the equation wrong while watching the kids swim too.
 
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Turn your SWCG off for a few days and let the FC drift down.

Are you using a SpeedStir? If not, you should definitely get one.

How did your FC get that high?

Consider adding some hydrogen peroxide to deplete your FC below 20 (SLAM level for CYA 50).
 
pjt said:
Turn your SWCG off for a few days and let the FC drift down.

Are you using a SpeedStir? If not, you should definitely get one.

How did your FC get that high?

Consider adding some hydrogen peroxide to deplete your FC below 20 (SLAM level for CYA 50).
Click to expand...
To be honest, I'm not sure. When the contractor opened the pool he added a pound of shock, other than that it's just the SWG. I'm honestly not even sure how it works. This is my settings in OmniLogic if that can help with an explanation or if its too high.

And a speed stir is next on my list.
 

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Not sure if you have a cover, but if you do, leave it off or pulled back. The sun should reduce that extremely high FC very quickly.

Just be sure your FC test math is correct:

Grab a 10 ml water sample size then add just one generous scoop of powder. Then mix and add the R-0871 drops until clear and divide the result in half. Example: 40 drops to clear equals an FC of 20. To test your skills, run a quick FC test on your tap or hose water (not softened). It should be around 1-2 ppm or so.
 
Texas Splash said:
Not sure if you have a cover, but if you do, leave it off or pulled back. The sun should reduce that extremely high FC very quickly.

Just be sure your FC test math is correct:

Grab a 10 ml water sample size then add just one generous scoop of powder. Then mix and add the R-0871 drops until clear and divide the result in half. Example: 40 drops to clear equals an FC of 20. To test your skills, run a quick FC test on your tap or hose water (not softened). It should be around 1-2 ppm or so.
Click to expand...
No, i do not have a cover.

Do you by chance have a picture of the generous scoop? Do you use the little blue spoon? That's what I used, but perhaps didn't add enough?
 
Texas Splash said:
Not sure if you have a cover, but if you do, leave it off or pulled back. The sun should reduce that extremely high FC very quickly.

Just be sure your FC test math is correct:

Grab a 10 ml water sample size then add just one generous scoop of powder. Then mix and add the R-0871 drops until clear and divide the result in half. Example: 40 drops to clear equals an FC of 20. To test your skills, run a quick FC test on your tap or hose water (not softened). It should be around 1-2 ppm or so.
Click to expand...
Curious as to why one generous scoop vs two smaller scoops like the instructions say. I feel like whether you use 10ml or 25ml water sample, you still put in same amount of powder, two scoops.
 
Whynotme said:
Curious as to why one generous scoop vs two smaller scoops like the instructions say.
Click to expand...
The "two scoop" is from the Taylor instructions for the 25 ML water sample. We encourage (typically) the 10 ml water sample size to save on reagents. The 10 ml size also provides an accurate results with easier math at the end (divide in half).
 

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amentowasso said:
Do you by chance have a picture of the generous scoop? Do you use the little blue spoon?
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The exact amount is not critical. But instead of a perfectly "level" scoop (yes, the blue spoon), a small hump of powder is fine.
 
amentowasso said:
it took 53 drops for the FC test
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That's a bit more reasonable. With a CYA of 50, you're slightly above SLAM level so we can rest easier now. It should continue to fall in tomorrow's sun. But watch that CC level. It should be 0.5 or less, so no more than one or two drops.
 
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Texas Splash said:
The "two scoop" is from the Taylor instructions for the 25 ML water sample. We encourage (typically) the 10 ml water sample size to save on reagents. The 10 ml size also provides an accurate results with easier math at the end (divide in half).
Click to expand...
Hmmm, the instruction card doesn't specify if the two scoops is for the 25ml or 10ml sample, so I've used two small scoops regardless of water sample size used.
 

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