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Thread: Weird stuff in middle of pool

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    Weird stuff in middle of pool

    Hello! So I have an Intex 22'x54" round pool with an Intex sand filter, and SWG. I am just starting to get this thing under control now, but I have always had this stuff collect in the middle. I will vacuum it out to waste and the very next day it starts again. The amount you see in the pics is after 3 days. I have replaced all my sand in the sand filter even though it is only a year old. I was thinking that maybe I need to add DE to the sand like I read somewhere on here. I thought it was algea, but even when I super shocked the pool and my FC was too high, it would still collect there. I included a pic of my enclosure because I was thinking that it might be debris, but not that much that fast! I am a newbie with the test kit, so maybe there is something I am missing....Here is the link to my pics....

    https://onedrive.live.com/redir?resi...D7138438%21103
    22' x 52" Intex Ultra Frame Pool
    Intex Sand pump/filter
    Intex Salt Water System with Ozone
    Test Kit: TF-100

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    Mod Squad zea3's Avatar
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    Re: Weird stuff in middle of pool

    It looks like dirt. How strong are the winds in your area? Could you post a complete set of current test results?
    TFP Moderator
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    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Re: Weird stuff in middle of pool

    If you approach and try to touch it does it go poof into a cloud? Probably dead algae. Do an OCLT to make sure you don't have any surprises and make sure you're staying on the upper threshold of your FC/CYA range. Passing the upper target by 1 or 2 isn't terrible, just never let it get to the bottom or below. I'd run the filter 24/7 for a few days and possibly add some DE to your sand filter. I had some of that dead algae going on in my pool about a month ago and was able to clean it up with the de and keeping the FC up. You should be fine.
    ~19k Gal, IG Vinyl, Hayward SP2607X10 1hp pump, Hayward S200 Sand Filter, built in 70s, has 8 deep end with diving board, 1 skimmer, 1 return, 1 low hole, Polaris booster pump PB4-60, old Polaris robot not sure model, Rheem P-M266A-EN-C 266,000 BTU heater, solar cover, Taylor K-2006 test kit, Speedstir

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    Richard320's Avatar
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    Re: Weird stuff in middle of pool

    Does it look fluffy, like an aquatic dust bunny? Does it just disappear *poof* when you approach it with the brush or vacuum? If so, it's algae clumping.

    If it stays put for you to vacuum it up, it's probably just dust. Look around at the patio furniture and the windowsills. If they're covered, so is your pool.

    Just as a tip, before you order the kids out of the water, have them run around the edge to create a good whirlpool. Any dust and debris will end up settled in the center for easier vacuuming.
    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!

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    Re: Weird stuff in middle of pool

    Yea, it does go poof as soon as you touch it. I would also think that it is dead algae, but I am wondering why it still keeps appearing. I backflush and rinse my sand filter almost daily. I will post my latest test results tomorrow.
    22' x 52" Intex Ultra Frame Pool
    Intex Sand pump/filter
    Intex Salt Water System with Ozone
    Test Kit: TF-100

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    Richard320's Avatar
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    Re: Weird stuff in middle of pool

    Algae needs two things: algae spores and insufficient chlorine.

    We can see you have the spores, so you must have insufficient chlorine. Take it up to shock level now.

    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!

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    Re: Weird stuff in middle of pool

    Ok, thanks! I will do that and report back how things are going. Thanks again!
    22' x 52" Intex Ultra Frame Pool
    Intex Sand pump/filter
    Intex Salt Water System with Ozone
    Test Kit: TF-100

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    Mod Squad zea3's Avatar
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    Re: Weird stuff in middle of pool

    If you could post a set of current test results we could give advice more specific to your situation.
    TFP Moderator
    Helpful links: TF Test Kits,TFP Pool School, PoolMath
    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
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    Re: Weird stuff in middle of pool

    Ok, here are my test results.
    FC- 2ppm
    CC-.5
    TC-2.5
    CH-275
    TA-140
    CYA-41
    PH-7.5
    22' x 52" Intex Ultra Frame Pool
    Intex Sand pump/filter
    Intex Salt Water System with Ozone
    Test Kit: TF-100

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    Re: Weird stuff in middle of pool

    Quote Originally Posted by csterner2004 View Post
    Ok, here are my test results.
    FC- 2ppm
    CC-.5
    TC-2.5
    CH-275
    TA-140
    CYA-41
    PH-7.5
    FC is too low. That's how algae got started. Did you raise FC after you heard from Barney? How high?
    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!

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    Re: Weird stuff in middle of pool

    Nope. I just got back home and was gonna work on it this morning. So I can add just regular bleach to raise this right? Or is it better to use powder shock?
    22' x 52" Intex Ultra Frame Pool
    Intex Sand pump/filter
    Intex Salt Water System with Ozone
    Test Kit: TF-100

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    Richard320's Avatar
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    Re: Weird stuff in middle of pool

    Quote Originally Posted by csterner2004 View Post
    Nope. I just got back home and was gonna work on it this morning. So I can add just regular bleach to raise this right? Or is it better to use powder shock?
    Powdered "shock" ? You've been a member here for over a year and you still want to use powdered chlorine? What parameter do you think is too low - CYA or CH? Pool School - How to Chlorinate Your Pool

    No, you want liquid bleach. Lots of it. I suggest you go for the SLAM. You might be done with it in a day if the algae dust disappears and you hold overnight, but you want to kill it all. Follow the instructions Pool School - SLAM - Shock Level And Maintain
    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!

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    Re: Weird stuff in middle of pool

    Ouch. ****, somebody had a bad morning. Sorry I asked. And sorry I have been a member for a year and am just now getting around to learning. Geez...
    22' x 52" Intex Ultra Frame Pool
    Intex Sand pump/filter
    Intex Salt Water System with Ozone
    Test Kit: TF-100

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    Re: Weird stuff in middle of pool

    Quote Originally Posted by csterner2004 View Post
    Ouch. ****, somebody had a bad morning. Sorry I asked. And sorry I have been a member for a year and am just now getting around to learning. Geez...
    I think he was typing in good humor.
    DONE, 20 x 40, inground gunite, 30" raised bond beam with 3 12" sheer descents, 8' diving board, pentair 420 cartridge filter, vs-3050 pump, intellechlor ic-40, auto cvr, Tahoe blue pebble tech, 6ea 4' x 12.5' & 2ea 1' x 12.5' helicol solar panels, legend robotic cleaner.

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    Re: Weird stuff in middle of pool

    Time to learn then!

    Might be time for a pool school refresher.

    Are you familiar with the FC/CYA chart? Your mention of powdered shock sets off buzzers and alarms. Make sure you understand what you are putting in your pool.

    Liquid chlorine is being recommended because powders are going to either add CYA or CH along with the FC. Neither of those are going to go down without replacing water so unless you want or need more CYA or CH you should stick with liquid. If you're already at a CYA of 40 you're in a good place to SLAM without needing a truck load of bleach.

    After your SLAM you should probably raise your CYA up since I see in your signature that you have a SWG? I am not completely familiar since I don't have one but I know that the FC/CYA chart has different recommended maintenance levels for SWG pools vs. non SWG pools.

    *edit*
    Your signature says "regular filter/pump".

    Is it a sand, de, or cartridge filter?

    I'm guessing sand since they are a little more "common" for intex pools and cartridge filters don't get backwashed.

    It sounds like you may be backwashing too frequently. Unless you have a big green mess or the very tiniest filter you shouldn't need to backwash that often. Does your filter have a pressure gauge? Does the gauge work? (When you turn off the pump/filter does the gauge go down to zero?)

    TFP recommendation is to backwash when the pressure goes up 25% over normal clean pressure. (The pressure that shows just after a nice thorough backwash.)
    18' x 48" (42" water depth) Intex Metal Frame 6,700 Gallons
    Hayward Power-Flo LX 1.0 HP pump
    Hayward Pro Series S166T Sand Filter
    Original Intex Floating Skimmer

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    Task's Avatar
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    Re: Weird stuff in middle of pool

    Before you start your SLAM, do you have one of the recommended test kits or are those pool store test results that you posted above? You won't be able to succesfully SLAM the pool without one.
    16'x32' Inground Vinyl, 21,100 gallons, Hayward 1.5 HP Super Pump, Hayward Pro Series S244T 3.1ft Sand Filter
    TFTestKits, Pool School, ABC's of Pool Water Chemistry, Chlorine/CYA Chart, PoolMath

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    Re: Weird stuff in middle of pool

    Thanks for the info! Yes I do have a sand filter and yes the pressure gauge does work but I never waited till it got that high. I was assuming that the sand filter was blowing **** back into the pool and that is what was collecting in the middle. So that is why I was backwashing that much. I just got my TF100 kit a couple days ago so that is the one that I am starting to use now.
    22' x 52" Intex Ultra Frame Pool
    Intex Sand pump/filter
    Intex Salt Water System with Ozone
    Test Kit: TF-100

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    Re: Weird stuff in middle of pool

    Got 8% bleach today and will start the SLAM process tomorrow. I have kids in my pool all day today, tonight, and tomorrow. They would be very upset if I started today.
    22' x 52" Intex Ultra Frame Pool
    Intex Sand pump/filter
    Intex Salt Water System with Ozone
    Test Kit: TF-100

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    Re: Weird stuff in middle of pool

    Was also gonna add some DE to my sand filter too but I want to get the levels right first before I start screwing around with that.
    22' x 52" Intex Ultra Frame Pool
    Intex Sand pump/filter
    Intex Salt Water System with Ozone
    Test Kit: TF-100

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    Re: Weird stuff in middle of pool

    Ok, here is my update. Started the SLAM process Sunday afternoon. Got my FC up to 28, but I didn't have any stabilizer to add and my CYA was not at SLAM level. Late Monday I added the Stabilizer(I couldn't find liquid near me so I used powder) and brought my CYA up to 70. Been checking FC daily. It started to drop a few points yesterday so I added another gallon of bleach. I do brush out the pool twice a day. I am concerned though because there are still little piles of algea on the bottom. The water itself is crystal clear, but where the seams are, that is where the brown stuff collects. My pump has been running 24 hours a day. Someone asked about dust, and no I do not live in a dusty area. I am in North Florida and my entire pool area is screened in. The stuff does go "poof" when you get near it with the sweeper. And it is not gritty like dirt either. From what I have read, the SLAM process should only take a couple of days right? Or am I incorrect in that?
    22' x 52" Intex Ultra Frame Pool
    Intex Sand pump/filter
    Intex Salt Water System with Ozone
    Test Kit: TF-100

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