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Thread: 1-4 ppm FAC before adding CYA?

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    1-4 ppm FAC before adding CYA?

    I opened my pool a few days ago, and immediately dumped in four gallons of liquid chlorine to initiate the kill of the swamp-like appearance. As I took more tests today, I noticed my CYA is very low (below 20), and went to go buy some. I noticed that the bottle says to get the FAC level between 1-4 ppm before adding. Since I am currently SLAMing, my FAC is above 10. Is there any reason that I can't add CYA with the FAC at this level? Is there a detrimental effect that will prevent it from working? Thanks!

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    Richard320's Avatar
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    Re: 1-4 ppm FAC before adding CYA?

    No.

    And don't follow the directions on the bottle, either. They'll tell you to pour it in the skimmer. If you clog the filter and need to backwash (likely if the pool is a s wamp) before it's all dissolved, you'll lose what you just added. See Pool School - Recommended Pool Chemicals for how to add the various chemicals.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
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    Re: 1-4 ppm FAC before adding CYA?

    I noticed that the bottle says to get the FAC level between 1-4 ppm before adding.
    What brand is that? I would be curious to know why.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    frustratedpoolmom's Avatar
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    Re: 1-4 ppm FAC before adding CYA?

    Makes absolutely no sense. Your FC level does not affect when or how much CYA to add. Its the opposite...
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
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    Re: 1-4 ppm FAC before adding CYA?

    It's a PoolLife product. Didn't make much sense to me, but still wanted to check. Must just be a general guideline for what they suggest FAC to be. Thanks for the quick replies!

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    Captain 776's Avatar
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    Re: 1-4 ppm FAC before adding CYA?

    I didn't want to start another CYA thread, so I will ask my 2 questions here.

    What is TFP recommended ideal CYA range? I see many numbers here.

    Secondly, I see it recommended to put the CY acid in a sock in the skimmer.

    I dissolve mine in a pail of water and when completely dissolved, I pour it evenly all around the pool.........is my method ok?

    thanks
    8M x 4M X 2M no slope IG CONCRETE w/ceramic glass tile
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    Re: 1-4 ppm FAC before adding CYA?

    1. Depends on your climate/sun. I don't know much about yours, but in the US people in Phoenix/Las Vegas/Florida run 50-60, people in the North East might do 30ish. Here in SC once it gets full summer (which is now I guess) I plan on 40ish.

    2. If you really got it dissolved that's fine. I find that to be very difficult to do.
    Last edited by Mr Bruce; 05-26-2016 at 06:32 AM. Reason: somehow everything I typed got c/p again?
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
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    Captain 776's Avatar
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    Re: 1-4 ppm FAC before adding CYA?

    Seemed like the first time I dissolved it in the pail, it worked ok but the last time I tried it, it clumped up and I don't think it was ever going to dissolve, I put a strainer over the summer and poured it in then put on latex gloves to squash the lumps by hand.........I will use sock next time
    8M x 4M X 2M no slope IG CONCRETE w/ceramic glass tile
    17,000 Gal EMAUX SWG JAZZI FILTER W/1-3 mm glass media, Jazzi Multi-port valve with
    T-750 filter w/ glass media
    1 main drain sump -3 returns - 1 skimmer
    Kokido digital salinity tester, Kokida drops for CL Hanna digital PH meter, Taylor K-2006

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    Re: 1-4 ppm FAC before adding CYA?

    It's a PoolLife product. Didn't make much sense to me, but still wanted to check.
    I will call them and see what their reasoning is. More an more, TFP seems to be an accurate guideline for many standards. Maybe someday, they will look to us to set the guidelines.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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