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

Thread: White powder problems

  1. Back To Top    #1

    Join Date
    May 2015
    Location
    Port Charlotte FL
    Posts
    2

    White powder problems

    Moved from Original topic Here Mod Patrick B

    I have similar problem with white powder. It is a new Hayward salt chlorination system and the cell is clean. All chemicals, including calcium and phosphates, are in the normal range. I use a Porpoise paper (accordion) filter which is only a couple of months old. Last time I cleaned the filter, it was somewhat clogged with the white powder and it was caked on the bottom of the cartridge housing. The substance has no taste or odor. This is not the normal crystallization that you get with a salt cell. The folks at the local pool store seem stumped. I'd appreciate any ideas.

  2. Back To Top    #2
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: White powder problems

    If you could post complete test results, that would be helpful. As you mentioned that all chemicals are in the normal range including phosphates... I would have to say you're using pool store testing. Pool store testing is worth exactly what you pay for it. Nothing. They have a flash-bang gizmo that spits out concentrations to the thousandth digit but most of the time, every digit in the result is worthless.

    Feel free to post the full list of results you got from the pool store, but I'd have a hard time believing any of the values. You're better of with a Recommended Test Kit of your own.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  3. Back To Top    #3
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: White powder problems

    To add to what Joel said....

    Around here not much credence is given to pool store testing. While you would think that a "professional" would be the best, unfortunately in most cases it is quite the opposite. Between employees who blindly trust the word of chemical sales representatives and high school kids working in the pool store you end up with poor results from their testing. In my case two different pool stores told me my CYA was "fine", around 70 or 80. When I tested myself I found it over 200.

    Only you can decide if you are going to continue following the pool store advice or take control of your pool. To follow the pool care methods taught here you need to arm yourself with the knowledge and tools necessary to care for your pool.

    The knowledge is condensed in the Pool School link at the top of every page. It is a great community here, but we do ask that you read and try to understand the information being taught. Questions are always welcome and folks will try to direct you and teach you the methods.

    The tools are not limited to the brushes, vacuum hoses and other stuff you use around the pool, but include the most important item - one of the recommended test kits. You can buy a kit at a pool store, but again the pool store kits generally won't cut it. To effectively practice the TFPC methods, the FAS/DPD chlorine test is essential. All these kits contain that test while very few other kits do. Think of it this way, do you see a doctor blindly prescribing drugs without seeing the patient or having tests run? Here at TFP we are going to ask for photos so we can see the condition of the water and are going to ask for a full set of test results.

    The powder in you pool may be something as simple as dust/pollen blowing in, but without reliable testing we don't know.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  4. Back To Top    #4
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: White powder problems

    And... welcome to TFP!
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  5. Back To Top    #5
    laveenmoose's Avatar
    Join Date
    May 2012
    Location
    Laveen (Phoenix), AZ
    Posts
    41

    Re: White powder problems

    I had a similar problem last year. Do you know how old the water in your pool is/when it was changed last? When I had a similar type of build-up it was from calcification because the water in my pool was 8 years old!! I change the water, and the problem went away. The balance of the water was fine at the time, too. Not saying this is your answer, but it sounds similar to the problem I had.
    10.5K IG gunnite pool with micro-pebble finish in Caribbean blue with Baja step. Haywood main filter with Perry's Pool Pump 1hp motor. Jandy CL-340 cartridge filter. Circupool RJ30 SWG system. TF100 test kit with Speedstir. Floating beer cooler.

  6. Back To Top    #6
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: White powder problems

    Quote Originally Posted by laveenmoose View Post
    I had a similar problem last year. Do you know how old the water in your pool is/when it was changed last? When I had a similar type of build-up it was from calcification because the water in my pool was 8 years old!! I change the water, and the problem went away. The balance of the water was fine at the time, too. Not saying this is your answer, but it sounds similar to the problem I had.
    Well that would show up in the CH test ... which the OP said was in the "normal" range. We have to worry about the CH climbing more than someone in FL where they get a lot of rain.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  7. Back To Top    #7
    laveenmoose's Avatar
    Join Date
    May 2012
    Location
    Laveen (Phoenix), AZ
    Posts
    41

    Re: White powder problems

    Quote Originally Posted by jblizzle View Post
    Well that would show up in the CH test ... which the OP said was in the "normal" range. We have to worry about the CH climbing more than someone in FL where they get a lot of rain.
    Very true.
    10.5K IG gunnite pool with micro-pebble finish in Caribbean blue with Baja step. Haywood main filter with Perry's Pool Pump 1hp motor. Jandy CL-340 cartridge filter. Circupool RJ30 SWG system. TF100 test kit with Speedstir. Floating beer cooler.

  8. Back To Top    #8

    Join Date
    May 2015
    Location
    Port Charlotte FL
    Posts
    2

    Re: White powder problems

    Total chlorine 4.0ppm
    Free chlorine 4.0 ppm
    pH 7.4
    Total alkalinity 120ppm
    Calcium hardness 375ppm
    Stabilizer 60ppm (I measured it at 100 ppm the same day)
    Salt 3450 ppm
    Phosphates <100ppm
    I live in SW Florida.

    Since the last time I vacuumed the pool, there has not been any visible while powder on the bottom of the pool or any buildup inside the filter housing. However, when I drag my foot along the bottom of the pool, some dust kicks up. It does not appear like the original white buildup.

    FYI, the heat pump is still on and the pool is covered with a blanket when not in use.

    Thanks for any assistance.

  9. Back To Top    #9
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: White powder problems

    Welcome to TFP!!!

    We want your test results, not the pool stores.
    Do you have one of the Recommended Test Kits?
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

Posting Permissions

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