Pool Opening..Used Algaecide And Floc...Now The Pool Is White And Cloudy...

by Sonny
(Clear Up A Green Pool eBook)

Opening pool for season. It was yucky. I shocked and added algaecide per direction. Ran for 24 hours then added flock. Ran for 2 hrs on recirculate and left for 24 hours. The pool usually clears and dead algae sinks to bottom to remove by vacuuming.

This year it still has a white surface and can't see the water has cleared like usual. Did I use too much floc? Not enough? Any suggestions?


Thanks for the question Sonny

I would first encourage you to read a couple of questions that have already been answered about pool start ups, algae, and flocs:

I Took The Winter Cover Off And My Pool Water Was Cloudy..Pool Start Up..

Can Super Floc Remove Pool Algae?

What Can I Do About A Chemical Mess During Pool Start Up?

An algaecide is for preventative maintenance, and nothing more. It won't get rid of any algae that's already in the pool, only a good chlorine pool shock will do that.

You can go to these pages to learn exactly how much you need for a good shock to clear up your algae:

Swimming Pool Chlorine

Pool Shock

You alway want to go a little higher when shocking your pool. Up to 12 - 15ppm is fine, as long as you do it properly.

You never want to "just hit the mark" because you run the risk of not hitting the super chlorination spot.

If you choose to use an algaecide for weekly pool maintenance, be sure it's a PolyQuat 60. This has no metals and is safe for vinyl pool liners.

The question says "left for 24 hours". I'm not sure what that means, but I hope you didn't turn the pump motor off.

When your clearing up your pool you need to keep the filter running 24/7.

Yes, you can use a pool floc and the pump turned off, but this should be done after a good shock, filtering, and backwashing.

What many people do is add chemicals at the same time. This is where patience is needed.

You may have used too much floc. Sometimes it does take 48 hours for the floc to work.

If it has been over 24 hours and the water is still not clear, I would suggest you filter once more and keep it running.

Clean and/or backwash your filter once per day.

You can go here to find out how to clear up your algae:

Swimming Pool Algae

Green Pool Water

Hope this helps and and a safe and fun swimming season.


Comments for Pool Opening..Used Algaecide And Floc...Now The Pool Is White And Cloudy...

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Jul 13, 2015
Floc Keeps Returning Can't Get Rid Of It
by: Anonymous

Hi. I have an inground pool im estimating a little of over 40 gallons. Pool company took the cover off but left it to sit for weeks. Long story short we took over the opening three weeks later and its been a nightmare. finally got things good. however my problem is the floc. every morning there is more there vacuum to waste but still more there in the morning. not a ton but quite a bit. i have a catridge filter

Thanks for the question Susan. First we need to determine the reason why the floc was used. I'm not a big proponent of using anything that is not needed, but it's always the customer's choice. Hopefully the water is clear and balanced and the filter is working.

I would first ask how many filter hours the cartridge has on it? If it's >2000, or close to it, it's time to replace it. They only last about 2000 filter hours and get worn down and the fabric starts to get thin. Next, are you spraying the cartridge out ever 12 hours? If the filter is allowed to over-load with floc the water that's being returned back to the pool will have floc in it. Those would be my starting points - old filter, not spraying it out, or a combination of both.

If you feel your situation is more complex than this, I do phone and/or SKYPE consultations. It makes things go much faster and many people have found it extremely beneficial, saving them time and money in the long run. All your questions will be answered. I have nothing to sell you so you know I'm not bias. If you purchase a personal phone consult you'll get all 3 eBooks for free.

Pool Consultation

Clear Blue Pool eBook

How To Clear Up A Green Pool eBook

Swimming Pool Resources


Jul 18, 2014
Floc Use
by: Robert

First, I'd like to have your complete chemical readings, the actual numbers:

Chlorine, CYA (cyanuric acid/stabilizer), pH, Alkalinity, Calcium Hardness, and Metals (iron and copper) and names of any algaecides you may have used along with clarifiers, phosphate removers, and/or flocs. It makes troubleshooting much easier and the process of clearing up your pool will go much faster.


Jul 18, 2014
i used floc
by: Anonymous

Hello, I went to my local pool supply store and they gave me a lot of things to do to get rid of my algae problem well I bought all these chemicals and it did take the algae away for two days now it's back so I went back to the pool supply store they told me use some other products so here iam buying more chemicals I have put in alkalinity in the pool waited 4 hour and then put some pool algea control and then waited another 3 hour and put some floc in it can u tell me what's next after I vacuum it what's the next step

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