testing errors - Can OCL be 0 ?

[midijamm]

I have recently had some ridiculous test results.

I am not one that cannot follow directions. I know that I am doing the tests correctly (with corrective council from this site)

I recently ran out of DPD powder and got some new. Don't know if that is relevant but I had no problems before that.

Started getting cloudy water (perhaps due to laziness in not brushing and vacuuming) and I started getting impossible FC readings (increasing FC without adding any)

Started shocking day before yesterday (and brushing and vacuuming) and OCLT was been less than 1

Pool still cloudy.

Last night OCLT was 0.

Is that possible or am I still getting screwy readings

 

[BoDarville]

Something is definitely not right. FC does not spontaneously increase in a pool. The only way FC increases is when some is added.

Started shocking day before yesterday

What are you using to "shock" with? Are you following the SLAM Process process? How old are the other reagents?

 

[Fungi]

I had this exact problem and it turned out to be my 6 year old water collection bottle while looked clean had a chlorine demand. If I tested immediately it was higher than if the sample sat in the bottle for a short time. Maybe a long shot, but it is definitely a thing.

 

[midijamm]

shocking with 5.25% Home Depot bleach
Following the SLAM process religiously.
Using new Taylor K2006 kit and new Reagents.

FC loss last night 0
CC 0

Maintaining 13 PPM
water still cloudy
greenish yellow dust on floor

brushing and vacuuming

 

[jblizzle]

Well, could just be a filtration problem.

Have you inspected and Deep Cleaned your Sand Filter?
Or you could try to Add DE to your Sand Filter

 

[tim5055]

shocking with 5.25% Home Depot bleach
Following the SLAM process religiously.
Using new Taylor K2006 kit and new Reagents.

FC loss last night 0
CC 0

Maintaining 13 PPM
water still cloudy
greenish yellow dust on floor

brushing and vacuuming

What is your CYA?

 

[midijamm]

Been backwashing filter and adding the occasional DE supplement

CYA is 34

Water is slowly clearing

Again,

Is zero FC loss overnite possible

 

[pooldv]

Sure, if there is no organic material in the pool to consume chlorine. It doesn't seem likely with your description of what is happening with your pool right now. There are only three options I can think of. It is either true, test error or bad test reagent.

 

[tim5055]

Been backwashing filter and adding the occasional DE supplement

CYA is 34

Water is slowly clearing

Again,

Is zero FC loss overnite possible

How are you testing to get a CYA of 34?? The K-2006 CYA test gives results in numbers that end in "0"

 

[midijamm]

How are you testing to get a CYA of 34?? The K-2006 CYA test gives results in numbers that end in "0"

The same way I would determine I was going 34 MPH on a speedometer that had numbers that end in 0. it is 4/10 of the way between 30 and 40

Is that wrong?

While on the subject of testing technique, When I am testing for FC, and I know I am going to put in 20+ drops, is it ok to put in 5 or 10 and then swirl?

TIA to you all

 

[tim5055]

The same way I would determine I was going 34 MPH on a speedometer that had numbers that end in 0. it is 4/10 of the way between 30 and 40

Is that wrong?

While on the subject of testing technique, When I am testing for FC, and I know I am going to put in 20+ drops, is it ok to put in 5 or 10 and then swirl?

TIA to you all

Yes, that is wrong. The scale on the tube is not linear like a speedometer. If you notice the distance between the different readings changes as you go up the tube. It is safest to chlorinate based on the next highest reading.

You really should continually swirl. That is why most of us purchased a SpeedStir after our wrists began to hurt....

 

[pooldv]

You really should continually swirl. That is what most of us purchased a SpeedStir after our wrists began to hurt....

LOL, right!

 

[midijamm]

You really should continually swirl. That is why most of us purchased a SpeedStir after our wrists began to hurt....[/QUOTE]

While I really respect and appreciate all the info you guys so graciously give, I am the consummate cynic and doubter so I did the FC test swirling drop by drop and then I did it again a bunch of drops at once….

AND … Drum Roll!!!!

You're right.
Completely different result