Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 9 of 9

Thread: Sand filter not working well

  1. Back To Top    #1

    Join Date
    May 2007
    Location
    Memphis, TN
    Posts
    44

    Sand filter not working well

    I've read several other threads regarding sand filters, replacing sand, etc. I have replaced the sand 2 yrs ago, but for some reason this year the filter does not seems to be clearing the water much at all. I have used a garden hose with spray nozzle to clean the sand by simply moving the nozzle around inside of the filter (top to bottom); then backwashing it out. It seems like the filter is just not picking up fine matter. This is now the 3rd time this season so far where the water has become what I call 'dirt cloudy'. I treat the water with a Fall Out type product. After the treatment, a ton of matter is on the pool floor that I vacuum to waste.

    So, my question is ....is there anything I can do (or not do) to retain the crystal clear water I have after the Fall Out treatment? I know about using DE powder with sand...although I also hear on some fronts its not recommended as the sand will definately clump together. HELP Please!!
    33000 IG Vinyl, Sand Filter, Circupool SWG, Polaris 180 w/Booster Pump, Mosquito Misting System, Home Automation

  2. Back To Top    #2
    UnderWaterVanya's Avatar
    Join Date
    Jun 2012
    Location
    Mint Hill, NC
    Posts
    2,589

    Re: Sand filter not working well

    Can you post water test info?
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

  3. Back To Top    #3

    Join Date
    May 2007
    Location
    Memphis, TN
    Posts
    44

    Re: Sand filter not working well

    PH 7.4
    FC 8.5
    CC 0.0
    TA 70
    CYA 41

    Its vinyl, so I don't worry about Calicum/hardness too much. I do not believe there is any kind of algae problem as the salt system does a good job of keeping the CL at a good level. If I'm away from the pool for several days, I'll even drop in a 'tab' to the skimmer to assist with a little extra 'everything' (cya) as needed while I'm gone.
    33000 IG Vinyl, Sand Filter, Circupool SWG, Polaris 180 w/Booster Pump, Mosquito Misting System, Home Automation

  4. Back To Top    #4
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Sand filter not working well

    pool-school/add_de_to_a_sand_filter might be an idea. Also check the circulation pattern, maybe an eyeball got moved somehow so things aren't getting stirred up where the skimmer can grab 'em.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  5. Back To Top    #5

    Join Date
    Jan 2010
    Location
    Randleman,NC
    Posts
    620

    Re: Sand filter not working well

    I didn't have enough sand in mine..Add'd 50 lbs & problem was solved
    Leasure bay AG 24ft,52 in high.installed June of 1999. Hayworth S-180 T sand filter/Power-Flo Matrix 1horse 2 speed pump /Aqua Trol SWG/Using TF-100 Test Kit

  6. Back To Top    #6
    stev32k's Avatar
    Join Date
    Mar 2009
    Location
    Mobile, Alabama
    Posts
    492

    Re: Sand filter not working well

    Quote Originally Posted by kplaster
    I didn't have enough sand in mine..Add'd 50 lbs & problem was solved
    Same thing here. Sand gets washed out on backwash and I usually have to replace about 50 lb every year.
    20' x 40' IG with vinyl liner volume approx. 35,000 gal.1.5 H.P. main pump, Polaris 280 cleaner W/ 3/4 H.P. booster pump
    Hayward sand filter, 3.14 sq ft, 62 gpm. Stenner 45 MPH10 chlorine feed pump. 1 micron final filter bags (home made and very effective)

  7. Back To Top    #7

    Join Date
    May 2007
    Location
    Memphis, TN
    Posts
    44

    Re: Sand filter not working well

    I will check the sand level...but with it being replaced not too long ago, I'm hoping that I haven't lost that much. It would have to be thru backwash or something along those lines as I haven't seen any sand come into the pool (that would be bad). The eyeballs are all in good shape, everything is as it's always been for circulation, etc.. I have used DE powder in that past at times, not often at all since I replaced the sand though. DE does have a tendancy to clump together the sand and the only way I know to clear that is a hand wash (via hose/nozzle). So, I didn't want to potentially ruin the new sand by using DE as much as I did in the past.

    I'll let ya know about the sand level. I may need to call the manafacture and see what the depth is supposed to be to determine the right level...else how do you know when it's too little (or too much)??
    33000 IG Vinyl, Sand Filter, Circupool SWG, Polaris 180 w/Booster Pump, Mosquito Misting System, Home Automation

  8. Back To Top    #8
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: Sand filter not working well

    Post your CH value. Too little is not a problem for vinyl, but too much still can be.

    Quote Originally Posted by Abxflyr
    else how do you know when it's too little (or too much)??
    That is a problem, some manus do not state a height, just a weight. If you have a round tank, having the level near/slightly above the middle is about right, but if yours has a cylindrical portion in the center, then it is harder to say, but it is common to be about 2/3 up the cylinder.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  9. Back To Top    #9
    stev32k's Avatar
    Join Date
    Mar 2009
    Location
    Mobile, Alabama
    Posts
    492

    Re: Sand filter not working well

    I have the Hayward 244T and the factory recommends the sand level to be 6" below the bottom of the top flange. A neighbor has a Hayward S310T that is larger than mine and the sand level in it is also supposed to be 6" from the bottom of the flange. His holds 500 lb, mine holds 300 lb.
    20' x 40' IG with vinyl liner volume approx. 35,000 gal.1.5 H.P. main pump, Polaris 280 cleaner W/ 3/4 H.P. booster pump
    Hayward sand filter, 3.14 sq ft, 62 gpm. Stenner 45 MPH10 chlorine feed pump. 1 micron final filter bags (home made and very effective)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •