CC test with fas dpd

[Boomerbull]

Is there anyway to skip the FC test and go right to the CC test with the Taylor kit?

I want the resolution to be be 0.2ppm, but I don’t want to waste 80 drops on the FC test because I know what my FC is and don’t need to test it.

 

[Bperry]

Is there anyway to skip the FC test and go right to the CC test with the Taylor kit?

I want the resolution to be be 0.2ppm, but I don’t want to waste 80 drops on the FC test because I know what my FC is and don’t need to test it.

Why do you want 0.2ppm resolution?

 

[Boomerbull]

Just because my cc has tested at .5 the last 3 days with .5 resolution during a slam. I want to see if it’s actually .2, .4, or even .6 to know if I can stop slamming.

 

[Mdragger88]

So you have passed the other 2 end of slam criteria?

Crystal clear water (no algae dead or alive)
&
1ppm or less overnight chlorine loss?
.5ppm is precise enough
As for your original question- it is my understanding that you must eliminate fc within the sample first

 

[Boomerbull]

Crystal clear water. 0.5ish pppm CC.

I’ll be doing the overnight test tonight. I lost 3 ppm during the day today, so feeling pretty good about it.

 

[Bperry]

Just because my cc has tested at .5 the last 3 days with .5 resolution during a slam. I want to see if it’s actually .2, .4, or even .6 to know if I can stop slamming.

The test is designed for 0.5ppm resolution. Just keep going until it takes one drop or less for the cc sample to go clear. The goal is zero CC but the test resolution is 0.5 so that’s essentially considered close enough to zero.

 

[Boomerbull]

Sounds good! Thanks everyone, I’ll report back tomorrow if my overnight test passes.

I started the SLAM because my FC got to about 0.5 and my CC was about 1.0

 

[duraleigh]

I want to see if it’s actually .2, .4, or even .6 to know if I can stop slamming.

I think the SLAM article says that a reading of .5 ppm is treated exactly like a reading of 0.0

 

[Boomerbull]

FC went from 15.0ppm to 14.5ppm. CC still measured about 0.5ppm. CYA at 30. SLAM complete! Gonna stop the slam and bring the CYA up a bit. Thanks everyone!

 

[Bperry]

FC went from 15.0ppm to 14.5ppm. CC still measured about 0.5ppm. CYA at 30. SLAM complete! Gonna stop the slam and bring the CYA up a bit. Thanks everyone!

Was the CC 0.5 or less? “About 0.5” leaves room for questions.

 

[Mdragger88]

@Boomerbull Clean your beaker with alcohol

 

[Boomerbull]

Was the CC 0.5 or less? “About 0.5” leaves room for questions.

It was clearly pink after adding the drops to develop the CC. But it disappeared after 1 drop of 0871. Which has been where it’s been at for 4 days. Keep SLAMing?

 

[Boomerbull]

@Boomerbull Clean your beaker with alcohol

Oh! Ok!

 

[Bperry]

It was clearly pink after adding the drops to develop the CC. But it disappeared after 1 drop of 0871. Which has been where it’s been at for 4 days. Keep SLAMing?

That’s 0.5ppm or less which means you’re done. Close enough to zero. It’s only more than 0.5 if it takes more than one drop.