New Kit Just arrived! What am I doing wrong?

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TC1006

Member
Aug 24, 2024
18
Chicago
Hello, Per the recommendation from everyone here, I got the TFP100 Pro Salt kit.

Pool details. Fiberglass, 14000 gallons. SWCG. Temp 88-89 degrees.

I was able to test the Salt and Ph and they seemed to go ok.

However, the FC test seemed way off. I followed the instructions and ended up dropping 60+ drops before the water turned clear.

Is my FC really 30+? It seems I’m doing something wrong. I did it twice and it was the same result.

Also, I followed the test for pH and the Br side turned orange.

I haven’t performed any other tests yet.

Also, is it ok for me collect the sample in a jug and bring it inside to do the tests?

Please help. IMG_4272.jpeg
 
What sample size did you use? I'm guessing 25ml sample size.

Use these instructions and a 10ml sample. Each drop is .5FC

Make sure reagent is vertical. When you drop the drops, don't squeeze them out fast. Squeeze slowly and let the drop form and drop under its own weight. Wipe the tip of the reagent bottle with a wet rag to get rid of the static charge, your drops will become bigger.

www.troublefreepool.com

FAS-DPD Chlorine Test

The FAS-DPD chlorine test is used to find the level of Free Chlorine in the … Read more…
www.troublefreepool.com www.troublefreepool.com
 
Hello. I used the 10ml sample size as instructed in the book that came with the kit. Also used the Speed stir device. Filled the tube with 10ml. Dropped the stir piece. Added the powder and then the drops.
 
Make sure reagent is vertical. Evacuate a bit of air before you turn the reagent over. When you drop the drops, don't squeeze them out fast. Squeeze slowly and let the drop form and drop under its own weight.

Finally, Wipe the tip of the reagent bottle with a wet rag to get rid of the static charge, your drops will become bigger. It has been happening a lot recently. The static charge allows the drops to come out faster and smaller, leading to higher results.
 
Turn it off and wait it out. You'll take a couple days to drift down, if not a week and a half.

Take a good look at the orange OTO test. That's 10+ and sometimes 8.5 +. It's not wrong, 30 is in fact 8.5+, but its not exactly specific, huh? It's no peach when it's yellow either. So use the powder FC test exclusively. Down the road, if you just want a spot check because you're sure you have plenty of FC in there, then go make sure it's taxicab yellow.

CYA needs overhead sun to test (with your back to it). The rest can be brought indoors with whatever (clean) container you'd like. But no glass is allowed poolside.

Ever. :)
 
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Newdude said:
Take a good look at the orange OTO test. That's 10+ and sometimes 8.5 +. It's not wrong, 30 is in fact 8.5+, but its not exactly specific, huh? It's no peach when it's yellow either. So use the powder FC test exclusively. Down the road, if you just want a spot check because you're sure you have plenty of FC in there, then go make sure it's taxicab yellow.
Click to expand...
@Newdude - What does it mean by "use the FC powder test exclusively"?
 
Hey Folks, I am having a really hard time understanding why there is such a massive difference between what the TFTKits Pro says my FC is and two other tests done at two separate pool stores.

Following the FAS-DPD powder method, now four times, the TFT tests show my Chlorine level is at 28 (it came down from 30+ two days ago). However, two different pool stores are reporting 9.93.

How do I reconcile that? Pls help.
 
It's entirely possible their FC test maxes out at 10 ppm. Really makes you wonder just how high some people unknowingly have their chlorine levels...

This is best reconciled by not having water tested at pool stores. The kit you have in your possession is more reliable than their digital sales tool. EDIT: but the posters below are correct, it won't hurt anything to double check your testing.
 
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TC,

Do you know any of your neighbors that have a pool? Even if you don't know them, just ask for a water sample and see what you get..

If this 'unknown' sample also reads very high, then I would suspect your new test kit.

If the sample tests in the normal range, then it would confirm that your pool has really high FC..

Not a very accurate test, but easy to do..

Thanks,

Jim R.
 
When using the comparator block and adding 5 drops or R-0600 to the water sample on the left side, what color does the sample turn?
While not a definitive test or highly accurate indication of chlorine level, it will provide an indication of whether the FC is high or not.
Let us know the result.

Chances are good your FC is as high as the FAS-DPD test indicates.
Pool stores are inaccurate in testing.
 

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