OCLT accurate at 56 degrees?

[wgipe]

Hi guys,

Long time no post. I suppose that's a good thing. I opened my pool to 8PPM of chlorine at around 50 degrees. The last couple of years, later in the season, I ended up with a weird situation where chlorine was being used at a more rapid rate than normal, and ended up with a short SLAM to bring things back in line. I thought I'd get ahead of it this year and just open with a SLAM. However, when I raised to SLAM level (16, because my CYA dropped to 40 over the winter - thought I'd SLAM before raising that to the normal 70), it has stayed there for 4 hours (actually tested at 18, slightly over, just now). If I do an OCLT tonight with water temp at 56 degrees, is it accurate? Does water temp affect that? Thanks as always for your wisdom! I'm ready to get this thing up to 85 and start swimming!

Wes

 

[ajw22]

Yes, the OCLT is accurate at 56F, but...

There can be a little bit of algae in the water at 56F and it is not replicating and you pass the OCLT.

Raise the water to 85 and the algae wakes up and starts replicating.

So redo the OCLT once you heat up the pool. Passing at 56F is good, passing it at 85F is better.

 

[JamesW]

I opened my pool to 8PPM of chlorine at around 50 degrees.

That's called an OWCLT (Over Winter Chlorine Loss Test).

If you open with chlorine, you passed.

Probably no need to SLAM unless you see algae or some other indication of a problem.



Note: I just made up the OWCLT, but I think that it will probably be a thing once people realize how genius it is.

 

[Newdude]

Probably no need to SLAM unless you see algae

+1. No visible traces whatsoever. No exceptions.

(And welcome back !!!)

Note: I just made up the OWCLT, but I think that it will probably be a thing once people realize how genius it is.

I went there last year.

It held 10 FC on its own all winter so that's one heckuva OCLT.

 

[wgipe]

Thanks, fellas! There was some black algae-looking stuff in one of the skimmers, so I'd probably better keep a close eye. I wiped it all down really good when I opened, and no sign whatsoever anywhere else.

 

[Newdude]

There was some black algae-looking stuff in one of the skimmers,

Same old stuff or new stuff ?

SOLVED: Black sticky mystery goop in skimmer

Thought I'd post this in case it helps someone in the future. Since opening the pool this spring, I've been battling the mysterious black sticky greasy residue at the water line in my skimmers that appears to be plaguing some others here from time to time. Of course when it showed up, the...

www.troublefreepool.com

 

[Mdragger88]

That's called an OWCLT (Over Winter Chlorine Loss Test).

If you open with chlorine, you passed.

Probably no need to SLAM unless you see algae or some other indication of a problem.



Note: I just made up the OWCLT, but I think that it will probably be a thing once people realize how genius it is.

Whoo hoo I guess I’m in the OWCLT Club!
I may need to add that to my siggy along with my #teamRunHot badge (not a thing but should totally be a thing)

 

[JamesW]

There was some black algae-looking stuff in one of the skimmers

Pretty common.

It is usually body oil, suntan lotion etc.

 

[wgipe]

Same old stuff or new stuff ?

SOLVED: Black sticky mystery goop in skimmer

Thought I'd post this in case it helps someone in the future. Since opening the pool this spring, I've been battling the mysterious black sticky greasy residue at the water line in my skimmers that appears to be plaguing some others here from time to time. Of course when it showed up, the...

www.troublefreepool.com

Same looking stuff. All of it was at the water line.