# Thread: FC, CC, TC New Math

1. ## FC, CC, TC New Math

I got my TF-100 kit Tuesday, still practicing/playing with results.

If FC+CC=TC
then
2.5+0=1

What am I doing wrong?

2. ## Re: FC, CC, TC New Math

Where is the 1 coming from?
if FC=2.5
CC=0
TC=2.5

3. ## Re: FC, CC, TC New Math

The FAS-DPD only measures FC and CC ... then you add them up to get TC. Do not try to compare the FAS-DPD chlorine numbers to the OTO number directly (if that is what you are doing). Trust the FAS-DPD.

4. ## Re: FC, CC, TC New Math

If you are using the OTO chlorine test (from the blue box inside the box) to get the TC number, then just ignore that result. The OTO readings are rather imprecise.

5. ## Re: FC, CC, TC New Math

Oooooohhhh gotcha. For the OTO, that's why the instructions say, look but don't write them down. I'm pretty sure that's what I was doing. Thanks!

I'm using the SimplePool app because I can select TFP parameters. It has TC and CC, but not FC.
I used to use the Pool Care app, and it has FC and CC. I can enter and set the TFP parameters - would that be better?

Thanks again for sitting through another newbie mistake.

Nic

6. ## Re: FC, CC, TC New Math

Pool Pal is another Android option to try, although a lot of people seems to like SimplePool ... never heard of Pool Care.

7. ## Re: FC, CC, TC New Math

Simple Pool: If FC and CC are the more important numbers, why is FC left out, and TC included?

Pool Care: Trying to enter TFP parameters and every time I save, it crashes.

Pool Pal: I've got it, but didn't like the interface. I don't think I can enter "ranges" only specific numbers for goals. It does have the TFP numbers to see/refer to.

I'll try Pool Pal again - Thanks!

Edit: I finally got Pool Care to keep the levels - it's worth a 2nd look.

8. ## Re: FC, CC, TC New Math

Go to the Simple Pool thread and ask about the FC vs TC ... I agree I do not see why TC is in there:

simplepool-app-for-android-a-review-t41962.html?hilit=android%20app

9. ## Re: FC, CC, TC New Math

It calculates the FC for you. I don't know why, but I just enter my TC and the CC and in the adjustment section it shows the FC number and gives recommendations based on whichever "system" you choose. I choose to use TFP settings.

10. ## Re: FC, CC, TC New Math

But why enter TC? You do not actually measure that. So you have to test the FC ... remember that number. Then test the CC. Then remember the FC and add the CC and then enter the TC and CC ... does that not seem like more effort than just being able to enter FC and then CC ????

11. ## Re: FC, CC, TC New Math

I don't disagree....you do have to remember both numbers. It'd be nicer to just enter FC and CC....

12. ## Re: FC, CC, TC New Math

Even though I do not use the app, I just sent Ken a PM asking this question and I see that Nplsdvr posted the question in the Simple Pool thread.

I mentioned to Ken he should let the user pick whether they want to enter TC or FC.

13. ## Re: FC, CC, TC New Math

It has to do with the DPD chlorine test, which measures FC and TC.

14. ## Re: FC, CC, TC New Math

Thanks for that info!

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