Question about Hayward SAND FILTER, PRO SERIES

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Not filtering correctly

When I vacuum my pool, the filter isn't filtering the algae, it is throwing green algae water back out. Why?

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The alge will always work through the filter and eventually cause problems in the filter. What you need to do is kill all the alge so when it's dead and just dirt the filter will collect it A small amount of DE powder in the skimmer will help at this point but be sure the alge is killed off first. You can use a lot ok liquid chloriene to start the process. Depending on how bad it is and how big a pool you have. I will usually start with about six to ten gallons and repete after twelve hours if nessary.

Posted on May 08, 2010

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I have a sand filter and my levels say ideal but water is real cloudy after adding chlorine


Take a sample to a pool shop and find out. If the pool has been green you may have dead algae floating around, a sand filter will never take that out. You need to flock it or new water. Then there is the toy you call a sand filter, OK when everything is perfect but small filters and pumps just won't handle a very dirty pool.

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Have you backwashed the unit? That would clean out remaining algae.

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Algae dust in pool


I think Brandon's answer deserves a little more time and a slight explanation... as I think it is Spot On!
Algae dust is usually "Already DEAD" algae!
And normally it is way to Small & Fine to be trapped by the filter.
We here on this forum do not know what type of filter you have, But if you do have a "MultiPort" valve as Brandon suggested you turn to the "Waste" mode, you will not use the filter mode to vacuum, as this will only BLOW the Fine Silt like substance right back into your pool, spreading out into the water to be suspended turning your water cloudy if not green, until it settles, and once again you have a covering of Dead Algae Dust on the floor of your pool. But when the filter valve is in Waste mode, you will bypass the filter and the return line altogether and your vacuumed algae silt will be sucked up into the valve, and OUT the valve to waste. And just like that all of the algae dust is vacuumed out and did not Blow back into your pool.
I just had a situation where we cleaned up such a pool where the customer couldn't get the algae out, we came out and vacuumed to waste. And I by chance took a picture of the partially vacuumed pool and Dust remaining.

algae-dust-in-pool-iwrnrkacomuoeuyhvucmvd0t-2-0.jpg If you don't have a multipart valve, then if the pool has no debris but only dust, then and ONLY then, should you use Backwash mode. You NEVER want to vacuum a pool with debris in Backwash mode! NEVER!!! Because the larger debris you are vacuuming will get caught in the internals of your lateral drain assembly or your DE Grids. then it will be very difficult to un clog them, which in turn will reduce proper water filtration efficiency! But the algae dust will be able to pass right on thru. If you have neither of these types of filters because you have a Cartridge style filer, the elements may be able to trap the dust, if it is still to fine to filter, you obtain an additional pool pump, place it pool side, and in the pump out the pump will be two vacuum hoses and away you go.

Good Luck

Aug 01, 2013 | Pool & Spa

1 Answer

My husband converted our 27 x 52 round above ground pool over to saltwater two weeks ago and we have yet to be able to get in it to swim. We drained all 18,700 gallons, scrubbed the liner and refilled the...


Wrinkles in your pool liner wall is a slight problem and can be a place for algae to grow, BUT can be treated and cleaned.. Algae will appear if your not providing the correct amount chlorine, regardless of wrinkles or not.. Let me tell you how I take care of my 14,500 gallon 18' X 33' X 48" pool using only the 8110 Intex model and hope you can apply some of my techniques to your pool and system...
In the 2 years I've own my system, I have not added any chlorine, even for those times my system failed and water turned green.. Yes.. I could have bought SHOCK and CHLORINE and added to my pool to kill the algae, but chose to vacuum, brush and set my chlorinator to max and did it without buying any of these expensive chemicals.. It took over 3 days to finally see results after running my system at at 12 to 14 hrs pump and 10 to 12 hrs chlorination.. After my pool cleared and chlorine level was at optimal, I lowered my chlorination to around 6 to 8 hrs.. Right now that the temperature is around 95 degrees, I run the pump for 12 hrs and chlorinate for 10.. My chlorine level is slight low and today I plan to raise my chlorination to 11 hours.. My pool water right now is crystal clear and clean. I vacuum my pool daily and check the electrolytic cell weekly for optimal results..
Now...you have a huge above ground pool, almost 19,000 gallons!!! To start.. you should have added almost 500 lbs of salt!!! and ran the pump only for over 24 hrs to properly dissolve the salt..
Next, you should test the water salt concentration level and should have been between 2000 and 3000 ppm. After the proper level and because your pool is so big, run your pump at 12 hrs or longer and possible 10 to 12 hrs chlorination...
You said the manual vacuum sucks up the liner??? They sell a nifty device that hooks up at the end of the hose and attaches at the skimmer inlet that has a relief spring activated door that prevents sucking up the liner and also, you may to look for a different vacuum head???
Bottom line... NO, the only way to clean the algae is NOT with vacuum and brush only..It could be done with SHOCK and CHLORINE.. I chose not to add shock and chlorine to mine.. But you will need to vacuum the dead algae and clean you filter several times..One more thing... I hope your chlorinator is big enough for your size pool.. The max gallons the manual shows is for a 14500 gallons, like mine... Good luck and hope this info helps...

Aug 14, 2011 | Intex Automatic Salt Water System for ...

1 Answer

Hi I have ab 18x52' intex above ground pool with klear saltwater system, but I have algae in the bottom of the pool, please tell what to do to clean it without emptying the pool, and can i use any...


Get ready for a full weekend of cleaning your pool :) This is the chemical free method...
1st... Start with a clean filter...So clean your filter...
2nd.. Vacuum your pool and get most of the algae up from the bottom and sides.. Go slow so you do not stir up the algae. Make sure you use the vacuum attachment with brushes..
3rd..Clean your filter...
4th...repeat step 2 again...
5th... Clean your filter...
6th... Brush your pool with a pool brush to loosen the remaining algae..
7th... Set your pump timer for 12 hrs and your chlorinator for 10 to 11 of those hrs... and run for 3 days...
8th.. Check your water and see if has cleared and the algae is almost completely gone.. If so, check your free chlorine level and adjust your cycle down if at the required level..
9th.. if your chlorine level is not at optimal, run at the 12 hr cycle for 3 more days and check..
10th.. After water is clear and free of algae, clean your filter and adjust your cycle down to control your free chlorine level...
Good luck and hope this method works for you.. It has for me for over 2 years with my Intex Salt Water system...
Please take the time to rate me and write a comment... really appreciate!!!

Aug 03, 2011 | Intex Automatic Salt Water System for ...

1 Answer

What would cause my pool water to bypass the sand filter?? When i vacuum the algae off the bottom of the pool, i can see it coming back thru the return. The filter removes some of it, but not all. We...


algae is too fine for the sand to filter, filter to waste when you have algae or it will get in your filter now you have to backwash and super chlorinate your pool to get rid of it

Jul 07, 2011 | Hayward SAND FILTER, PRO SERIES

1 Answer

We changed our pool over to salt water four days ago ago and it is cloudy and has green algae in it. It had green algae when we switched. We thought the salt water system would kill it, but it is still...


You don't mention the size of the pool. If this is a above ground small pool ... dump the water, clean the liner and refill it. Remove the metal with a sequestering agent. Get the alkalinity correct. Get the pH correct then add the salt to 3200 ppm.

Chlorine kills algae. Are you sure it is algae and not metal in the water?

pH should be 7.2 to 7.6. Alkalinity should be 100. If a gunnite pool, the calcium should be 300. Salt should be 3200. Cyanuratic acid should be 50+ if this pool is outside (not indoors).

What to do. If this is a big pool, and you are sure this is not metal in the water, I would super chlorinate the pool - take it to 20 or so ppm. Run the filter for at least 24 hours. Watch the pressure ... you will be filtering out a lot of stuff.

Let me know what happens ...

Thanks for your question @ FixYa.com

May 24, 2011 | Intex Automatic Salt Water System for ...

1 Answer

When i run my pump while vacuming, my pool turns green


As in most cases today, pumps and filters are not properly matched. The filter cannot retain such fine algae particles because they are being driven through the sand bed by an over zealous pump. I suggest that you let the dead algae settle to the bottom. top up water and use the vacuum to waste position on m.port valve. Vacuum in such a way that you dont stir up the debris.

Aug 14, 2009 | Hayward SAND FILTER, PRO SERIES

1 Answer

My filter is returning green slime to the pool as fast as i vacumn it up.I can see it being pumped back in the pool.Why is my filter not working?


It could be that there is algae growing inside the tank of the filter. You may want to vacuum to waste to get the algae out of the pool and clean out the filter. If you have a Cartridge or DE filter, you will need to do an acid bath for the grids. Take the internal parts out of the filter and clean with bleach water, use bleach water on the tank also.

If you have a sand filter, you will need to empty out the sand, clean internal parts and tank with bleach water then fill with new sand.

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