Chlorine Lock ?

[FormerBromineUser]

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Carl: You are my absolute favorite storyteller on the Pool Forum (!!!) and have been SO much help to me with my pool!

I just had time to reread this whole thread and I noticed these responses (posts 96-100) from PoolDoc and wondered if you caught them.

Ok, you're reporting what sounds like mustard algae -- so you'll need even higher levels of chlorine.

... ~35 ppm or HIGHER!

Mjsboone has been aiming for a shock level of 25ppm. Do you think he's still good to go to maintenance?

[mjsboone]

That is correct. PoolDoc wrote that what I was describing sounded like mustard algae. We have vacced to waste 2 times and have not tried to get the FC 35ppm as we were afraid we could not use the pool and here in SC, we use our pool! My husband said tonight he noticed that he thought there was a slight powdery substance on bottom-not over entire bottom, but enough that if he swiped his foot, he saw greenish stuff that just disappeared. The pool remains very clear. If I could get a few days that I knew we would not be using the pool, should I bump it up to 35ppm? For how long?

[Watermom]

Yes. Take it on up. Mustard algae is tough to eradicate.

[mjsboone]

Gosh! Hopefully got one problem under control and now mustard algae! How long does it take to get rid of it? Days? Weeks? Do we continue to brush or just vac to waste? This pool is making me crazy. I love it but, it has been a real pain in the rear this summer.

[FormerBromineUser]

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Please don't be discouraged!

Look at all you have learned:
-How to ignore pool store advice!
-How to use a K2006! (Consider getting larger replacement bottles, btw)
-Not to use your chlorinator and tabs (except for vacation if you choose)
-The importance of maintaining good CYA/FC ratios
-That CC is not a good thing...!!!
-Patience
-etc.

I try not to give much advice here as there are some really, really knowledgeable people on this forum who can answer MUCH better than me. But I have noticed that you received some conflicting advice over the last month. That's only because people really want to help you that they have chimed in but I think it has contributed to your confusion. My advice? Learn to recognize the experts and go with their recommendations.

[FormerBromineUser]

...you received some conflicting advice over the last month.

Whoops! I meant confusing!