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Thread: A little algea, help me kill it fast and balance my water!

  1. #21
    Mod Squad BoDarville's Avatar
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    Re: A little algea, help me kill it fast and balance my wate

    Manalex:
    To raise FC from 22.5 to 28 in a 35K pool, Pool Calculator tells me to add 399oz of 6% bleach. This is a bit more than 4-96oz jugs (384oz). You're definitely on the right track, though.
    TFP Moderator 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
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  2. #22
    Mod Squad Bama Rambler's Avatar
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    Re: A little algea, help me kill it fast and balance my wate

    Yes you should bring it up to 28 ppm. I get (4) 96 oz bottles too.
    I'd test it every few hours and hold it there until you pass the OCLT.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 1.5hp Dynamo pump. 24" Pentair Sand Dollar Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    You can stop SLAMing your pool when you pass the OCLT (You lose 1ppm or less FC overnight, & You have .5ppm CC's or less) & your water is clear.

  3. #23
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    Re: A little algea, help me kill it fast and balance my wate

    ARRRHHGGGG!!!!

    Woke up this morning with the pool water down about 6 inches. The cover on the debris screen for the pump was loose and leaked all night. Now I'm adding water to the pool which will surely change the balance. Can't think of anything more frustrating at the moment.

    Tested anyway and got the following results:
    FC=19
    CC=0.5
    TC=19.5
    PH=7.2
    T/A=140
    CH=175
    CYA=55
    Salt=3200

    Everything looked stable except the FC, which fell from 22 to 19. I added three jugs this morning, and finish with whatever I need to add later this afternoon. Not going to have to start from scratch completely, but this will change things a bit going forward. Hopefully I'll have a full pool when I get back from work this afternoon, retest and go from there. Anybody want to guess as to what the results will be?

    A
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  4. #24
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    Re: A little algea, help me kill it fast and balance my wate

    After arriving home last night, pool full retested and got the following results:
    FC=19.5
    CC=1.0
    TC=20.5
    PH=7.5
    T/A=145
    CH=175
    CYA=55
    Salt=3200

    I had three more bags, 1lb ea, of the Walmart shock, so based on the pool calculator results, I threw them in before going to bed. Still had a little algea so I fgured that I'd keep shocking.

    This morning, scrubed and found even less algea, and I got the following results:
    FC=25.5
    CC=0.5
    TC=26.0
    PH=7.4
    T/A=135
    CH=175
    CYA=55
    Salt=3200

    Can't seem to get the CYA up any more than 55. I know I lost some water, and results don't fully register immediately, but for it not to change at all even after adding additional shock seems odd-should I be concerned? Any body know why the CYA has not increased?

    Hopefully, the little algea that remains will be gone this afternoon. If it is I'll try the over night test. Water is very clear BTW.

    One more thing, I have cartridge filters, and only now have they begun to read as "dirty". I do plan on having them cleaned out but was wondering if this would present any kind of hindrance?

    Thanks in advance...
    Jandy AquaLink RS Control Unit
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  5. #25
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    Re: A little algea, help me kill it fast and balance my wate

    Yes! Completed the OCLT this morning and didn't have any drop in FC! Here are my results:
    FC=21.5
    CC=0.5
    TC=22.0
    PH=7.3
    T/A=120
    CH=175
    CYA=50
    Salt=3200

    So now that I've completely eradicated every living organism in my pool, I suppose I have to Begin concentrating on balance. Thanks to everyone that helped and contributed. I'll start another thread to get advise on where to go from here...
    Jandy AquaLink RS Control Unit
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    Jandy 1hp pumps (3)
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  6. #26
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    Re: A little algea, help me kill it fast and balance my wate

    Actually, please keep your question right in this thread. It gives all the responders a "history" and often helps get better advice.

    BTW, Very nice work on getting your pool crystal clear!
    Dave S.
    Site Owner 42k vinyl and concrete pool, 1.5hp pump, 140gpm filter, No SWG
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  7. #27
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    Passed OCLT! Now what?

    After what must have been a small out break of Algea, I shocked thE pool for a couple of days and last night/this morning completed the OCLT and passed. I now need to begin the process of balancing the water chemistry and would like some advise on where to begin. Here are my test results:
    FC=21.5
    CC=0.5
    TC=22.0
    pH=7.3
    TA=120
    CH=175
    CYA=50
    Salt=3200

    A little background: I initially shocked the pool with Trichlor. FC increased significantly (1 to 31), as did CYA (40 to 55). It's been less than a week and given the amount of shock that was added the CYA level is expected to be around 70. That said, CYA has been stable at 50-55, ever since I shocked and re-shocked the pool. I used both Trichlor and bleach to keep FC at shock level.

    So, where do I go from here? I would like to employ the BBB method....

    Thanks in advance.
    Jandy AquaLink RS Control Unit
    Jandy AquaPure SWCG
    Jandy 1hp pumps (3)
    35,000 Gal Pebble Tech
    Jandy 580 sq ft Cartridge Filters
    Vanishing Edge, Spa w/Waterfall

  8. #28
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    Re: Passed OCLT! Now what?

    Quote Originally Posted by Manalex
    After what must have been a small out break of Algea, I shocked thE pool for a couple of days and last night/this morning completed the OCLT and passed. I now need to begin the process of balancing the water chemistry and would like some advise on where to begin. Here are my test results:
    FC=21.5
    CC=0.5
    TC=22.0
    pH=7.3
    TA=120
    CH=175
    CYA=50
    Salt=3200

    A little background: I initially shocked the pool with Trichlor. FC increased significantly (1 to 31), as did CYA (40 to 55). It's been less than a week and given the amount of shock that was added the CYA level is expected to be around 70. That said, CYA has been stable at 50-55, ever since I shocked and re-shocked the pool. I used both Trichlor and bleach to keep FC at shock level.

    So, where do I go from here? I would like to employ the BBB method....

    Thanks in advance.
    1. Let your FC drift on down to around 4ppm or so

    2. Calculate and add enough CYA to get that level at 60-70ppm.

    3. Turn your SWG back on and enjoy your summer!! Hold the FC between 3-5ppm
    Dave S.
    Site Owner 42k vinyl and concrete pool, 1.5hp pump, 140gpm filter, No SWG
    TFTestkits owner
    TFTestkits , PoolMath , Pool School

  9. #29
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    Re: Passed OCLT! Now what?

    Quote Originally Posted by duraleigh

    1. Let your FC drift on down to around 4ppm or so

    2. Calculate and add enough CYA to get that level at 60-70ppm.

    3. Turn your SWG back on and enjoy your summer!! Hold the FC between 3-5ppm
    Thanks for your response! What about the other chems? Can I add for example, Calcium in order to get that level up without having to wait for the FC to come down? Do I need to manage PH or TA now, or do i wait until FC hits 4. Wen do I add borates? I really want to dump everything in at one time and have the results come out perfectly but understand that's not a likely option

    A
    Jandy AquaLink RS Control Unit
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    35,000 Gal Pebble Tech
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    Vanishing Edge, Spa w/Waterfall

  10. #30
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    Re: A little algea, help me kill it fast and balance my wate

    1. pH is fine.

    2. Unless pH rises VERY quickly, TA is fine, too.

    3. CH can come to around 250 when you get a chance but it's not something that has to be done right away. What is the CH of your fill water...it may increase on it's own.

    4. Do these steps one at a time. Don't be in a rush. Learn how to manipulate your parameters as needed. Your pool will always be changing a little from time to time so you can't fix everything at once and expect to walk away from it.
    Dave S.
    Site Owner 42k vinyl and concrete pool, 1.5hp pump, 140gpm filter, No SWG
    TFTestkits owner
    TFTestkits , PoolMath , Pool School

  11. #31
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    Re: A little algea, help me kill it fast and balance my wate

    Had a really nice day today. High 80s, sunny, beautiful day. Tested this evening and got the following results:
    FC=15
    CC=0
    TC=15
    pH=7.3
    TA=120
    CH=175
    CYA=50
    Salt=3200

    So it looks like FC was reduced by 6.5 during the day. A lot more than what I expected. At this rate, I expect to be at the target 4 ppm in a couple more sunny days. The SWCG is off. Also, CYA is still at 50. Why is it not increasing?
    Jandy AquaLink RS Control Unit
    Jandy AquaPure SWCG
    Jandy 1hp pumps (3)
    35,000 Gal Pebble Tech
    Jandy 580 sq ft Cartridge Filters
    Vanishing Edge, Spa w/Waterfall

  12. #32
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    Re: A little algea, help me kill it fast and balance my wate

    Pool looks great now! Here are the test results from this morning:
    FC=5
    CC=.5
    TC=5.5
    pH=7.6
    TA=110
    CH=245
    CYA=70
    Salt=3000
    SWG set at 65%, 12 hrs per day (still trying to figure out the right % and time)

    Had the pH down to about 7.2, tried aerating to get the TA down a bit, didn't have much luck though, then the pH creeped back up to 7.6. I'd like to think I'm in the fine tuning stages, but I'd like to get that confirmed...

    I have some scaling that I need to take care of. It developed, I know, because my CH had been way too low. Cleaning it off is on my to-do list. Am I correct in assuming that it will not get worse given the current water balance? Just trying to prioritize it with everything else on the list.

    Just ordered some Borate test strips so I can start adding Borax. I know I'm going to need some MA in order to keep the pH at the correct levels while adding Borax. However, I wanted to confirm that I am ready to start that process and was wondering if there were any recommendations with respect to the current water balance.

    Thanks!
    Jandy AquaLink RS Control Unit
    Jandy AquaPure SWCG
    Jandy 1hp pumps (3)
    35,000 Gal Pebble Tech
    Jandy 580 sq ft Cartridge Filters
    Vanishing Edge, Spa w/Waterfall

  13. #33
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    Re: A little algea, help me kill it fast and balance my wate

    Your numbers look very good and, indeed, you are in the fine tuning stages.

    Low CH did not cause scaling....High CH can but usually it is high pH that is the culprit. Keep you pH down around 7.0 - 7.2 (you must monitor this very carefully....don't go below 7.0) and you may see the scaling dissolve back into the water.
    Dave S.
    Site Owner 42k vinyl and concrete pool, 1.5hp pump, 140gpm filter, No SWG
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    TFTestkits , PoolMath , Pool School

  14. #34
    Mod Squad BoDarville's Avatar
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    Re: A little algea, help me kill it fast and balance my wate

    Quote Originally Posted by Manalex
    I have some scaling that I need to take care of. It developed, I know, because my CH had been way too low.
    Scaling mainly results from a high CH combined with a high pH. From the test results you have posted, neither seems to be the case.
    TFP Moderator 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
    A good test kit is an investment, not an expense.

  15. #35
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    Re: A little algea, help me kill it fast and balance my wate

    OK to try an add Borates?
    Jandy AquaLink RS Control Unit
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  16. #36
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    Re: A little algea, help me kill it fast and balance my wate

    Quote Originally Posted by Manalex
    OK to try an add Borates?
    It's best to get your TA in the 70 to 80 range first if using Borax and Muriatic acid.
    Bill
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