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Thread: passed OCLT, but need some advice

  1. Back To Top    #1

    Join Date
    Jul 2013
    Location
    Cedar Rapids, IA
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    82

    passed OCLT, but need some advice

    OK, so I opened up a week ago to a green swamp, and thanks to the help here, the green is gone and last night I passed the OCLT, but I want to be cautious before assuming I'm done slamming.

    So, last night at 9pm
    FC: 25
    CC: .5 or less (could barely tell if it even turned pink on adding the CC regent)

    This morning at 5:30am
    FC: 24.5
    CC: same

    Right around 8am this morning:
    FC: 21
    CC: Same
    Ph: 7.5
    TA: 70
    CH: 150 (based on a recent test)
    CYA: 60 (based on multiple recent tests within the last week, didn't redo this one today because sun isn't out)

    I'm using the TF-100 for my tests and BBB for my chemicals.

    I've been SLAMming the last week, and right now
    1. the water is crystal clear
    2. CC is .5 or less
    3. Overnight FC loss test shows less than 1

    BUT, I have this little brown dusty stuff that keeps showing up and I'm not sure if it's something to be worried about. It collects around seams mostly, does not shy away from the sun, is fairly easy to brush off (I don't have to 'scrub' but brush needs to have a little contact), and doesn't show up on the walls. (only floor surfaces)

    Here are a number of pics. You can see that I have stuff peeling off of the skimmer sock, and see the brown collections along with the cloudy result of brushing.

    http://s284.photobucket.com/user/ble...74551.jpg.html
    http://s284.photobucket.com/user/ble...74631.jpg.html
    http://s284.photobucket.com/user/ble...74621.jpg.html
    http://s284.photobucket.com/user/ble...74634.jpg.html
    http://s284.photobucket.com/user/ble...74752.jpg.html
    http://s284.photobucket.com/user/ble...74647.jpg.html

    What do you think? Do I need to keep slamming? Do I need to slam at mustard algae levels?

    For the record, here's the before and after from the last week of slamming:
    http://s284.photobucket.com/user/ble...tml?sort=3&o=7
    http://s284.photobucket.com/user/ble...tml?sort=3&o=6

    As always, thanks for any help and advice and will be donating!
    24,300 gallons, IG vinyl, Hayward Pro Series S244T sand filter, 3ft to 9ft deep

  2. Back To Top    #2
    freqz's Avatar
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    Sep 2013
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    Dallas, TX
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    Re: passed OCLT, but need some advice

    Looks like general, plain ol' garden variety schmutz to me.
    25000 gal in ground plaster. '79 vintage. Cartridge filter.

  3. Back To Top    #3

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    Jan 2013
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    Houston, TX
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    Re: passed OCLT, but need some advice

    I think dead algae or dirt that is settling to the floor and getting stuck in the seams. It should filter out over time ... or vacuum to waste.

    Keep and eye on your numbers - if you start to see some weird deviations (more FC use than expected or more CCs) it means I'm wrong and you should start the slam back up.
    TFP Moderator Chris V. ~16K Pool & Spa, 48NSF DE, IG Plaster Circa 2000, Intermatic PE653, Challenger pump with a 2 speed B2984, 20gal stenner chlorine injection, Houston, TX
    One cannot follow Islam and Christianity at the same time, nor can one follow pool store methods and TFP at the same time.
    Pool School -- Pool Math -- TF-Test Kit

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    Richard320's Avatar
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    San Dimas, CA (LA County)
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    Re: passed OCLT, but need some advice

    I think the problem is that the water is so clear you can see every speck.

    Go look at the windowsills and the patio furniture. If they have dust on them, it's also getting into your pool.
    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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    duraleigh's Avatar
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    Re: passed OCLT, but need some advice

    Passing the OCLT is pretty definitive. I think you are safe in allowing your FC to drift back to 4-6 ppm as a normal operating range. Nice work on getting your pool in good shape so quickly.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

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    May 2014
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    SW, MO
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    Re: passed OCLT, but need some advice

    Do you have a high pollen count in your area. It's bad enough here it coats the windshield and when you turn the cleaner on the wipers make a goo that looks just like that on the side of the windshield. Might explain why you have perfect numbers and ick showing up.

  7. Back To Top    #7

    Join Date
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    Re: passed OCLT, but need some advice

    We do have a high pollen count.

    I think judging from the posts here that she is ready to go. Can't wait to jump in. =]
    24,300 gallons, IG vinyl, Hayward Pro Series S244T sand filter, 3ft to 9ft deep

  8. Back To Top    #8

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    Jun 2012
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    Rochester, NY
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    Re: passed OCLT, but need some advice

    Quote Originally Posted by ChewBiscuit View Post
    We do have a high pollen count.

    I think judging from the posts here that she is ready to go. Can't wait to jump in. =]
    I agree on the pollen. It's horrible here.
    Rick
    Installed June 2012 Aqua Leader 24ft Round AG Influence w/54 inch walls 13,500 gallons
    Cartridge Filter 100SF, 1.5HP
    Aqua Plus Smarte System - In for vacations, BBB all the way.
    Love my PVC Solar Cover Hangers

  9. Back To Top    #9

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    May 2013
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    Souderton, PA
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    Re: passed OCLT, but need some advice

    That first picture looks like what settles on the bottom when cottonwood trees blow out their seeds - which in my area was the last week or two. besides regular pollen we had all this cottony stuff that when it sank to the bottom looked just like your picture!
    30 ft. round Aqua Leader agp with dished out center 23,800 gallons; 1.5 hp Hayward pro matrix pump; Hayward EC50 DE filter; solar panels; solar cover

  10. Back To Top    #10

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    May 2014
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    New York, NY
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    Re: passed OCLT, but need some advice

    I've been having a lot of debris in my pool this year, too. I did have to SLAM shortly after opening but even after I passed the OCLT and my CC was below 0.5, I was still seeing those clouds of dirt. I think it's just pollen. In my area everything bloomed late because it was such a cold and long winter. There's been more stuff in the pool than there usually is at this time. I honestly don't remember ever seeing those clouds of dirt in prior years but then again I never brushed the pool from the outside before so it's possible I've never noticed.
    16,000 gal. rectangle vinyl, DE filter, Haywood 1.5 hp pump, Polaris automatic cleaner, heater, looploc cover. Near NYC. Be the fish

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