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Pool filter not doing its job

10 metre * 5 metre pool... sand filter.. cloudy water...added floculante (clarifier) yesterday... left the filter off overnight to let it do its 'thing'... woke this morning to crystal clear water but smoky white layer on the bottom. Started to vacuum it up, but what the hey? The outlet sprayed the cr*p back into the pool. Had replaced the filter sand a week ago ... some web sites recommend running the filter overnight so it clogs up and therefore traps more... any comments welcome.

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Try using a clarifier that you add into the skimmer such as Clearex 500.
The flocculent only makes particles drop to the pool floor, a liquid clarifier actually coates the sand and will filter smaller particles. Also, check the o-rings on the backwash valve. If the o-ring(s) are damaged it may be letting some water bypass the filter.

Posted on Sep 15, 2009

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Posted on Jan 02, 2017

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3 Answers

Ph level is at 'ideal' chlorine level is at 3.0 but the pool water is still cloudy. Please help?


The cloudiness could be suspended particles or algae. Use an algae k i l l er as recommended, then a flocculant (water clarifier) as recommended, then vacuum the pool bottom and run the filter overnight.

After that check the ph, alkali level, chlorine level, and adjust as needed. That should do it.

Feb 05, 2017 | Pool & Spa

1 Answer

Why does the filter basket never seem to catch anything and it never reads to need to be backwashed...but the water is still not clear....what are we doing wrong?


Because of the size of the filter - 18", I would presume this is an above ground pool?

  • Do you have a skimmer?
    • If so, put some leaves, larger organic debris, etc. into the skimmer. They should end up in the basket of the Hair & Lint Pot!
    • That would prove your question to be either working or not.
  • If you don't have a skimmer, then you have a suction port in your pool.
    • Let that suction port suck some larger debris that would stay in the basket. Again, you will prove or disprove, whether debris is getting to your pump basket (Hair & Lint Pot Basket).
How long has your pump & filter been operating?
How long do you let your pump & filter run per day?
  • It should run at least 8 hrs per day.
  • If cloudy, you should run continuously until clear.
How long has your water been turbid/cloudy?
  • Use a clarifier, Natural preferred, like SeaKlear, daily at recommended dosage, until clear
What is the pressure?
Are you saying that it is the same pressure as Day 1, has not climbed at all?
What do you mean: Does not read that backwash is needed?
What in your understanding is: "Time to backwash the filter"?

You should know the "Starting Pressure" of your Sand Filter!
  • When sand is absolutely clean & free of any grime and sticky residue.
    • Just added media, when just installed is the best time to make a note of the starting pressure on a working pressure gauge.
  • When the pressure rises 8-10 lbs. over starting, time to backwash!

Jul 13, 2014 | Hayward Pro Series 18" Above Ground Pool...

2 Answers

How often do i change the filter sand


the longevity of your sand depends on how well you have treated your pool. most manufacturers will recommend around 5 yrs. if you have been doing nice long backwashes and havent had major pool problems, this period can be lengthened. basically, if your water is clear, chances are you dont need to change it. if you have cloudy water no matter what you do, its time.

Jun 14, 2014 | Hayward SAND FILTER, PRO SERIES

3 Answers

Pump is blowing cloudy water back into pool


Cloudy water is the bane of sand filters!. I suggest letting filter run day and night. Do not backwash until the pressure rises 8 - 10 pounds above clean starting pressure. Do not try to vacuum or stir up the sediment. when water clears, vacuum to waste. Keep the hose running while vacuuming. A dirty filter is a better filter (up to a point). At a higher pressure the filter will trap more of the fine particles that are clouding your water.

May 28, 2013 | Pentair Meteor Above-ground 22" Sand...

1 Answer

Cloudy white stuff is blowing into the pool. Just bought a sand pro filter system and installed it yesterday. Water is still cloudy with a white film on top.


If the white stuff is sand it will settle to the bottom. Check to see what it is. If it is sand then either there is a problem in the filter or the pump was plumbed backwards. I hope this helps.

Aug 12, 2011 | Hayward SAND FILTER, PRO SERIES

1 Answer

My pool is cloudy I have a 16'x48" the ph level is 8.0 the copper test is 0 the free chlorine[ppm] 0.2the alkalinity is right what should i do


How long has it been since you cleaned the cartridge in the filter? If it's been a while, I'd recommend cleaning it thoroughly with a filter cleaner (degreaser). This will help to filter out any small particles that can cause cloudiness. I'd also recommend that you increase the salt production on your salt system. The normal range for chlorine is 1-3 ppm. You're too low at 0.2. If all of these things are done and the pool is still cloudy, I would add a clarifier. FYI: too much is not better when adding clarifier!

Jun 16, 2011 | Intex Automatic Salt Water System for ...

1 Answer

Water comeing out cloudy and makeing suds in pool


There could be a few things causing these problems. How old is the sand in the filter? Filter sand looses its filtering ability after 3-5 years and needs to be replaced. If the sand needs to be replaced, make sure you get actual pool filter sand. A lot of big box and home improvement stores sell play sand as filter sand. That will cause your pool to stay cloudy and never clear up. If the sand is less that 3-5 years old, you may need to clean it with a liquid filter cleaner that is poured through the skimmer. This works quite well!

Another issue causing the cloudiness and bubbles could be the type of chemicals you are using. I know that shock from big box and home improvement stores cause the water to be cloudy. Algaecides from these stores also cause foaming.

Jun 15, 2011 | Hayward SAND FILTER, PRO SERIES

1 Answer

Water not clear


cloudy water is mainly due to poor pool maintainence.
Your purchase of the salt water system only helped you with not needing to pour chlorine in or float tablets.
You will still need to use chemecals.
I use a good stabilizer to hold the chlorine level longer
I use a non foaming algecide once a week
I also use a water clarifying product once a week

Now on to the clouds :-)

cloudy water is because of not enough sanitizer mixwd with a crappy pump from intex

I do not know the size of your pool so I will just use mine to show you #'s

I have a 7000gl pool with a 2500gl ph pump
A pool needs to be turned over at LEAST 3 times a day so for me it takes at least 8 hours of filtering alone this does not include making chlorine.
Bottom line is you should run your system 24/7 between generating and straight filtering

The only cure for less filtering is to get a sand filter with at least a 1 horse power pump to pump 4000gl and uphaving a sand filter helps trap more small particles than the cartridge filter.

I noticed the difference the first night I had my sand filter. It ran for 6 hours before me turning my pool light on and to my surprise I did not see as many particles passing my light as with the cartridge filter and the second night nothing Crystal clear.

Bottom line is intex pumps and so on are not big enough for the pool it comes with.

The salt system alone with a sand filter is great

Jun 26, 2010 | Intex Automatic Salt Water System for ...

1 Answer

Hayward sand filter not filtering small particles


You probably have too big of pump. It is pushing the finer stuff right back into pool. Try adding a clarifier. Don't backwash either until the pressure goes up.

Jul 30, 2009 | Hayward Pro Series 18" Above Ground Pool...

2 Answers

CLOUDY WATER


I too have this problem after treatment for algae, especially if I got a day or two without running the pump, it starts to get mildly green. After adding the algaecide, it kills the algae, but leaves what I call the white dead floating...it takes several days for this to phase out.

If you aren't already doing so, put 3" tablets in the pump basket housing, that helps dramatically. Put a pair of knee-high pantyhose (one inside the other), on the return inside the pool. (you will be amazed what it catches after a few days). Also you can try some "clarifier" to help clear up the cloudiness.

I'm no pool expert, but have dealt with the cloudiness myself. Through trial and error, have learned that cloudy water doesn't necessary mean dirty water. It will clear within a day or two if you are keeping stabilizer tablets in pump basket and using shock once a week. And run the pump for about 8-12 hours a day, it will clear up quicker. And to me, using the pantyhose is an extra-filter and it catches the 'gunk' that the sand in the filter isn't catching. (it can't possibly get everything). Be sure to backwash your pump frequently too.

Hope this helps at least some. Good luck!

Jul 28, 2009 | Hayward Pro Series 31 Inch In Ground Pool...

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