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Thread: Raleigh, NC Green Pool (May 2015)

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    Join Date
    May 2014
    Location
    Raleigh, NC
    Posts
    8

    Raleigh, NC Green Pool (May 2015)

    Hi All,

    I live in Raleigh, NC and this is my 2nd year maintaining my in-ground 25k gallon sand filtered pool.

    Was able to get it looking very good last year after a month of struggles and it was in great shape when I opened it this spring.

    However, I made the mistake of using an algaecide (yellow out) prior to leaving for three days while away on business. Turns out this product, while it can be effective eats away chlorine and so when I returned the pool was a solid green.

    I thought others might be able to learn from my mistake and be able to see what works and what doesn't in terms of bringing it back to clear.

    I use a TF-100 kit to test and will be posting numbers and pictures daily so you can track progress.

    Here is where my numbers were as of this Sunday, May 10th:
    TC: 5+
    PH: <6.8 (wonder if the Yellow Out lowered it or if the rain we had Saturday and Sunday dropped it?)
    CYA: 35
    TA: 20
    FC: 7.5

    Visibility:
    Shallow End Floor: 0%
    Middle Pool Floor: 0%
    Deep End Floor: 0%

    Actions:
    -Skim
    -Brush
    -Vacuum
    -Backwash (prior to adding chemicals)

    Additions:
    +40oz of PH Up (Pooltime Brand)
    +5lb Cal Hypo Shock (HTH Brand)

    25000 Gallon IG Vinyl
    Heyward Sand Filter
    2.2 HP Pump
    Chlorine Based
    2000 Install

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    Richard320's Avatar
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    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Raleigh, NC Green Pool (May 2015)

    Welcome!

    I like this idea. Pictures would be even better!

    What is your current CH reading? Although a vinyl liner pool doesn't need Calcium, too much can still cause scaling. You're adding a lot of CH with the Cal Hypo.
    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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    Mod Squad pooldv's Avatar
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    DFW, TX
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    Re: Raleigh, NC Green Pool (May 2015)

    Well, that is a bummer. Time to SLAM Your Pool.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

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    Join Date
    May 2014
    Location
    Raleigh, NC
    Posts
    8

    Re: Raleigh, NC Green Pool (May 2015)

    Picture update for Sunday, May 10th

    25000 Gallon IG Vinyl
    Heyward Sand Filter
    2.2 HP Pump
    Chlorine Based
    2000 Install

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    Join Date
    May 2014
    Location
    Raleigh, NC
    Posts
    8

    Re: Raleigh, NC Green Pool (May 2015)

    Update for Monday, May 11th:

    Definitely seeing the cloudy gray "bleach" effect start to happen even with the hot sunny weather. Shallow end went from solid swamp to light gray with dead algae that looked like dirt on the bottom, not sure if its mustard or green algae but trying to get the FC to mustard shock level either way.

    Weather:
    92/Sunny

    Updated Numbers:
    TC: 5+
    PH: 7.2
    CYA: 40
    CC: 0
    FC: 17

    Visibility:
    Shallow End Floor: 70%
    Middle Pool Floor: 0%
    Deep End Floor: 0%

    Actions:
    -Skimmed
    -Brushed
    -Vacuum (Shallow Only)

    Additions:
    +15oz of PH Up (Pooltime Brand)
    +1 Gal 12.5% bleach (will be using liquid from here on out)

    25000 Gallon IG Vinyl
    Heyward Sand Filter
    2.2 HP Pump
    Chlorine Based
    2000 Install

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    Beens's Avatar
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    Jul 2013
    Location
    Virginia Beach, Va
    Posts
    1,171

    Re: Raleigh, NC Green Pool (May 2015)

    From your numbers it looks like you are using the OTO chlorine test and the FAS/DPD test. (Because you're reporting a TC of 5+?) For the SLAM there's no need to use the OTO since it can't measure high enough to tell you how much chlorine to add. You just use FAS/DPD to tell your FC and your CC.

    Or am I reading your results wrong?
    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

  7. Back To Top    #7

    Join Date
    May 2014
    Location
    Raleigh, NC
    Posts
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    Re: Raleigh, NC Green Pool (May 2015)

    Quote Originally Posted by Beens View Post
    From your numbers it looks like you are using the OTO chlorine test and the FAS/DPD test. (Because you're reporting a TC of 5+?) For the SLAM there's no need to use the OTO since it can't measure high enough to tell you how much chlorine to add. You just use FAS/DPD to tell your FC and your CC.

    Or am I reading your results wrong?
    Nope you are correct, was just grabbing it because I had to run the PH test because I was very low. If TC ends up <5 for any extended period of time it'll be August before I can get in the water haha.

    Speaking of PH, whats the consensus? Is it even worth it to begin slamming when you are <6.8 or better to save the chemicals until that number is 7.2-7.5 and go full out at that point?
    25000 Gallon IG Vinyl
    Heyward Sand Filter
    2.2 HP Pump
    Chlorine Based
    2000 Install

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    Join Date
    Aug 2014
    Location
    Shallotte, NC
    Posts
    693

    Re: Raleigh, NC Green Pool (May 2015)

    Can't say for sure, but Ana dead centered us and our pH went from about 7.6 to 7.8... had to drain about 3 inches to keep from overflowing.

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    Mod Squad pooldv's Avatar
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    Aug 2012
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    DFW, TX
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    Re: Raleigh, NC Green Pool (May 2015)

    Use PoolMath to calculate how much Borax to add to get your PH up to 7.2, throw it in the pool and start SLAMming.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  10. Back To Top    #10

    Join Date
    May 2014
    Location
    Raleigh, NC
    Posts
    8

    Re: Raleigh, NC Green Pool (May 2015)

    Update for Tuesday, May 12th 2015

    Biggest improvement to date! Only green left is in the deep end, rest is a gray/blue.

    With the FC dropping from 17 to 15.5 even after adding a gallon of liquid chlorine yesterday I decided to add two more bottles this evening. Also had a drop in PH which was strange, so went with the PH up to try to get back into range.

    Weather:
    92/Sunny

    Updated Numbers:
    PH: 7.0
    CYA: 40
    CC: 0
    FC: 15.5

    Visibility (can see to bottom):
    Shallow End Floor: 100%
    Middle Pool Floor: 10%
    Deep End Floor: 0%

    Actions:
    -Skimmed
    -Brushed
    -Backwash Filter

    Additions:
    +20oz of PH Up (Pooltime Brand)
    +2 Gal 8.28% bleach

    25000 Gallon IG Vinyl
    Heyward Sand Filter
    2.2 HP Pump
    Chlorine Based
    2000 Install

  11. Back To Top    #11

    Join Date
    May 2014
    Location
    Raleigh, NC
    Posts
    8

    Re: Raleigh, NC Green Pool (May 2015)

    Update for Wednesday, May 13th:

    Not much progress today so I've gone nuclear in order to get the FC levels to mustard shock levels. My intention is to use the powder shock to get to 24+ FC then will maintain with liquid chlorine/bleach.

    Added some pictures of the algae I'm battling, any thoughts as to whether its mustard algae?

    Weather:
    83/Sunny

    Updated Numbers:
    PH: 7.0
    CYA: 40
    CC: 0
    FC: 15.5

    Visibility:
    Shallow End Floor: 100%
    Middle Pool Floor: 0%
    Deep End Floor: 0%

    Actions:
    -Skimmed
    -Brushed
    -Vacuum (whole pool)
    -Backwash/Waste

    Additions:
    +32oz of PH Up (Pooltime Brand)
    +4 Gal 8.25% bleach
    +3lb of Cal Hypo shock



    25000 Gallon IG Vinyl
    Heyward Sand Filter
    2.2 HP Pump
    Chlorine Based
    2000 Install

  12. Back To Top    #12

    Join Date
    May 2014
    Location
    Raleigh, NC
    Posts
    8

    Re: Raleigh, NC Green Pool (May 2015)

    Day 5 Update (Thursday, May 14th)

    FC Disaster struck today for unknown reasons. Went to measure the chlorine levels and determined that the level of available FC had dropped to 0!

    Still cant get to a consistent PH level so I've added Borax and will check progress again.

    No pictures today as I had to run to the store before it closed to pickup the high potency liquid chlorine to get back to shock levels.

    Weather:
    72/Partly Cloudy

    Updated Numbers:
    PH: 7.0
    CYA: 40
    CC: 0
    FC: 0

    Visibility:
    Shallow End Floor: 100%
    Middle Pool Floor: 20%
    Deep End Floor: 0%
    Overall water is still not clear, but more and more of the pool floor is becoming visible as I continue to vacuum.

    Actions:
    -Skimmed
    -Vacuum (whole pool)
    -Backwash/Waste

    Additions:
    +16oz of Borax
    +6 Gal 12% liquid chlorine
    25000 Gallon IG Vinyl
    Heyward Sand Filter
    2.2 HP Pump
    Chlorine Based
    2000 Install

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