Uncertain Free Chlorine Endpoint

[Bcorig]

The last three analyses I have noticed a cloudy solution that does not turn completely clear or colorless after adding R-0871 as it did before
There is a color change but the solution is muddy and slightly pink. I tried adding R-0003 then R-0871 to see if there are chloramines but the solution just remains muddy and slightly pink with little color change.
The SWG is 20%
Free Cl (I think) = 3 ppm when it changes from deep red to pink then over time bluish (see photos)
Total Cl = ?? See above
PH = 7.4 TA = 80
Calcium Hardness = 520
CYA = 53
Water Temp = 79F
Weather around here is unusually hot (90-100) sunny.
The second photo is after 6 drops R 0871 - no change with additional reagent third photo is after addition of R 0003 and then 4 drops R-0871
4th is the R 0870 powder.

The water looks great - clear, no algae or mold anywhere. Kids in the pool last weekend no eyes burning, no chlorine odor, no skin rash
At this point I can’t tell just WHAT the chlorine level is.

 

[loveSaturday]

What is the expiration date on your powder? It looks slightly purple in color in the photo.

 

[proavia]

For the FAS-DPD test - with higher CH levels, I've noticed the sample can turn cloudy. It doesn't seem to affect the test accuracy. Just continue to add drops until the pink-ish color is gone - clear or cloudy white-ish.

How old are your reagents?
Is the test kit stored indoors in air conditioning when not in active use?
You can do all tests indoors (maybe at the kitchen sink), except for the CYA test.

How did you get a CYA of 53?

If your CYA is close to accurate, it gets rounded up to 60.
Your FC is at bare minimum at 3. Add liquid chlorine to dose to high end of target range based on your CYA. See the FC/CYA Levels chart for target levels. Keeping FC at the top of target range provides a better buffer for when FC drops when the SWG if off, pool gets used, etc.

 

[reggiehammond]

Powder shows evidence of heat/moisture abuse. Are you storing your test kit outside? Powder should be white and powdery.

 

[TinFoilHat]

The powder, or what's left of it, looks grey. I would get new 0870 and try it again.

 

[Bcorig]

For the FAS-DPD test - with higher CH levels, I've noticed the sample can turn cloudy. It doesn't seem to affect the test accuracy. Just continue to add drops until the pink-ish color is gone - clear or cloudy white-ish.

How old are your reagents?
Is the test kit stored indoors in air conditioning when not in active use?
You can do all tests indoors (maybe at the kitchen sink), except for the CYA test.

How did you get a CYA of 53?

If your CYA is close to accurate, it gets rounded up to 60.
Your FC is at bare minimum at 3. Add liquid chlorine to dose to high end of target range based on your CYA. See the FC/CYA Levels chart for target levels. Keeping FC at the top of target range provides a better buffer for when FC drops when the SWG if off, pool gets used, etc.

I can’t tell if the FC in 3 or not because I don’t get a clear endpoint.
That’s why I included the shot of the powder. There is no expiration date on it.
All reagents a stored indoors in a cool dry place.
The dot disappears at a spot between 50 and 60 closer to 50 so I estimated 53.
I’ll bet it’s the 0870
Thanks!

 

[Bcorig]

The powder, or what's left of it, looks grey. I would get new 0870 and try it again.

Thanks that’s why I included an image of the powder.
I have a gift cert from TFP so I’ll reorder

 

[Bcorig]

The powder, or what's left of it, looks grey. I would get new 0870 and try it again.

Bingo it’s why I sent an image

 

[Bcorig]

Powder shows evidence of heat/moisture abuse. Are you storing your test kit outside? Powder should be white and powdery.

Always stored in an air-conditioned room.

 

[proavia]

I can’t tell if the FC in 3 or not because I don’t get a clear endpoint.
That’s why I included the shot of the powder. There is no expiration date on it.
All reagents a stored indoors in a cool dry place.
The dot disappears at a spot between 50 and 60 closer to 50 so I estimated 53.
I’ll bet it’s the 0870
Thanks!

If the dot disappears anywhere between the lines, round up to the next larger printed number.
Anywhere above 50 and below 60 gets rounded up to 60.

There should be no pink color left.
Even if the sample is cloudy, it will be a whitish clear - no pink.
And if you wait too long to determine if the pink is gone, chances are the sample will start to turn light pink again.
Are you using a Speed Stir or similar magnetic stirring device?

I've had powder that color with 2 year old powder and it seems to work fine.
How old are your reagents?