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

Thread: Cloudy during swim party? (added DE to sand filter)

  1. Back To Top    #1
    zimm's Avatar
    Join Date
    May 2013
    Location
    Northern Virginia
    Posts
    421

    Cloudy during swim party? (added DE to sand filter)

    Okay so I was having a pool party and all went wrong. I brushed the whole pool and the bottom had white "dust" that would stir up with the brush. The water got a little hazy and UPS brought me a bag of DE to try out in the sand filter. I added a 1/3 cup to the filter basket with no rise in pump pressure. Soon after, 5 kids, 4 adults, and a labrador dog are having a great time in the pool. I had the heater cranking for the whole day so the water was about 90 degrees by evening and the pool turned white! I don't know if it's the DE, or the bottom being stirred up, or what.

    Here are my numbers I just took:

    FC- 8.5
    CC- 0
    Ph 7.5
    TA 100
    Calcium 200
    CYA 50
    Salt 2900

    45'x12' 17k gal, IG plaster, Pool Pilot Nano+ SWG, 1/2hp Whisperflo pump, PAC-FAB TA-60D sand filter, Raypak 266 heater
    Pool School + Test Kit + Pool Math = Trouble Free Pool

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,084

    Re: Cloudy during swim party? (added DE to sand filter)

    The sequence of events is pretty hard to follow but, if you had "white dust" on the bottom of your pool, I would suggest running the pump 24/7 and brushing vacuuming and backwashing your filter as required.

    The chances of it being the DE are slim.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Cloudy during swim party? (added DE to sand filter)

    It is normal to see some cloudiness for roughly 24 hours after a pool party. There might be something else going on in addition, but most likely it is just the usual cloudiness after many people were swimming. Keep the FC level at the high end of normal and run the pump/filter for 24 hours and see how things turn out before trying anything additional.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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

    Re: Cloudy during swim party? (added DE to sand filter)

    Quote Originally Posted by zimm
    Okay so I was having a pool party and all went wrong. I brushed the whole pool and the bottom had white "dust" that would stir up with the brush.
    [center:3ikifihl]We have a clue!
    [/center:3ikifihl]
    Sounds like you haven't been brushing regularly. It's the equivalent of dusting the house. Neglect it too long and you just end up with it all airborne again and then it resettles.

    I'd suggest daily brushing until it stops clouding up in the wake of the brush. Get that stuff in suspension so the filter can grab it.
    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
    Butterfly's Avatar
    Join Date
    May 2007
    Location
    South Carolina
    Posts
    10,045

    Re: Cloudy during swim party? (added DE to sand filter)

    btw, your calcium at 200 is low.

    When is the last time you cleaned your filter?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  6. Back To Top    #6
    zimm's Avatar
    Join Date
    May 2013
    Location
    Northern Virginia
    Posts
    421

    Re: Cloudy during swim party? (added DE to sand filter)

    I backwash every few days. Did it this morning and yesterday. Calcium was 300 last time but I've been adding lots of tap water lately. I have a pail of hardness plus could use
    45'x12' 17k gal, IG plaster, Pool Pilot Nano+ SWG, 1/2hp Whisperflo pump, PAC-FAB TA-60D sand filter, Raypak 266 heater
    Pool School + Test Kit + Pool Math = Trouble Free Pool

  7. Back To Top    #7

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,084

    Re: Cloudy during swim party? (added DE to sand filter)

    I backwash every few days. Did it this morning and yesterday
    I don't want to veer too far from your original post but there is no need to backwash until you observe roughly a 25% increase in your psi.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  8. Back To Top    #8
    zimm's Avatar
    Join Date
    May 2013
    Location
    Northern Virginia
    Posts
    421

    Re: Cloudy during swim party? (added DE to sand filter)

    You guys were right, one night of running the pump cleared it up. Must have been sediment from the pool.

    So if I'm running 16psi- I should wait for 20psi to backwash? That could be weeks.... maybe that's a good thing.
    45'x12' 17k gal, IG plaster, Pool Pilot Nano+ SWG, 1/2hp Whisperflo pump, PAC-FAB TA-60D sand filter, Raypak 266 heater
    Pool School + Test Kit + Pool Math = Trouble Free Pool

  9. Back To Top    #9

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,084

    Re: Cloudy during swim party? (added DE to sand filter)

    Yep, 20 psi and, yep again, that will be a good thing.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

Posting Permissions

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