Question about OCLT

[anton]

Do the OCLT numbers have to coincide with each other that same night? Reason I'm asking is that I've been testing for OCLT the past two nights and both nights I have had CC of .5 or less and FC was a loss of 1 the first night and 2 the second night (or morning rather). Does that mean I passed the test because of the first night or do I keep going?
The pool has been crystal clear the past 5 days.

 

[Bama Rambler]

If you lost 2 ppm overnight on any night you haven't passed the test. Hold it at shock level and run it again tonight.

 

[harleysilo]

Well if you lost 1 the first night, with a CC of .5 why did you test the second night? Also how much sun was on the pool the second morning when you tested?

 

[anton]

I think I was second guessing myself :? and I tested the same time every morning before the sun came up. Last night's FC was 15 and was down to 13 this morning. The night before was 14 and went down to 13 and CC for both was .5

 

[harleysilo]

I think I was second guessing myself :? and I tested the same time every morning before the sun came up. Last night's FC was 15 and was down to 13 this morning. The night before was 14 and went down to 13 and CC for both was .5

Okay so you got the timing of the tests correct, perhaps it was testing error the first night. At any rate you failed the test last night, so i can only say keep shocking.

Can you post all of your test results, and how you are testing?

 

[Bama Rambler]

I always recommend running the OCLT two nights in a row. That way you're sure you passed. It appears that you haven't quite.

 

[anton]

Testing with TF-100. CYA at 35 and pH at 7.5 taken before shock process. Haven't done any other tests till I'm done with shocking.

@ Bama Rambler, that's what I think. I was just making sure...

 

[anton]

Does CC have to be at .5 from here on in after passing OCLT? If it goes up to 1.0, do I go back to shocking?

 

[Richard320]

Does CC have to be at .5 from here on in after passing OCLT? If it goes up to 1.0, do I go back to shocking?

As long as you maintain the minimum FC level after this battle, I doubt you will ever have a problem with CC above .5.

It also depends...if for weeks the pool shows 0 or.5 CC and the day after a big windstorm or a pool party it shows 1 CC, shocking is probably not needed. Just add an extra quart of bleach and let it sort itself out. But if it climbs for no good reason, or you got lax about maintaining FC, you need the shock process but you can probably do it in a day.

 

[anton]

It wasa couple days ago I passed OCLT. I checked this morning and CC was 1.0. Does that mean there's still bad stuff in the pool?

 

[Richard320]

It wasa couple days ago I passed OCLT. I checked this morning and CC was 1.0. Does that mean there's still bad stuff in the pool?

That depends...is there any other reason that there could be a lot of organics in the pool? Windstorm? Rainstorm? Pool Party?

If no, then follow Bama Rambler's advice.