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Thread: Is this a good idea?

  1. Back To Top    #1

    Is this a good idea?

    Right now these are my numbers

    FC 5
    TC 5
    TA 150
    PH 7.2 aerating to bring down TA now that pool is all sparkly
    CYA 30

    CRYSTAL CLEAR WATER!!!

    For a while my pool would end up at 2 to 2.5 mid day, then turn greenish and a nice algae bloom followed. I am not here every day to check mid day to bring the FC up.

    My solution was to I log a weeks readings and calculate how much chlorine my pool was using each day. I figured out that the pool used 4.5ppm per day and I don't want to fall below 4ppm mid day. I calculated that I needed to bring my FC up to 8.5 to 9 each night (LATE - after everyone is finished swimming for the day) in order to keep from dropping below 3 while I am not here.

    I know shock level for CYA 30 is 12 so I am below that and no one takes morning swims here. More afternoon and night time (when the bats are out dive bombing the pool) when the levels are closer to normal.

    Is there any harm in what I am doing?

    Or should I bring my CYA up to 50 and see how that balances out?

    Thanks for any advice in advance.
    Intex AG 2252 / 10421 Gallons / Vinyl liner
    Pool Set up - May 2016
    2650 gal/hr Intex Krystal Clear Pump- Type B Filter
    Intex SWG
    TFTestkit / SpeedStir Magnetic Stirrer!!! / BBB method only

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
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    Re: Is this a good idea?

    No harm, although that is a pretty high FC loss each day. You should do an OCLT to confirm nothing is in the water, if clean, then consider raising the CYA.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
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  3. Back To Top    #3

    Re: Is this a good idea?

    I did -- 4 days in a row after SLAMing just to make sure.

    I passed all 4 times. SOMETIMES I have a .5 cc but my FC never loses more than .5. (I love my test kit) My water is so clear you can see every nook and cranny even at night.
    Intex AG 2252 / 10421 Gallons / Vinyl liner
    Pool Set up - May 2016
    2650 gal/hr Intex Krystal Clear Pump- Type B Filter
    Intex SWG
    TFTestkit / SpeedStir Magnetic Stirrer!!! / BBB method only

  4. Back To Top    #4

    Join Date
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    Re: Is this a good idea?

    Where are you located?
    8,000 gallon, in ground, fiberglass pool with a cartridge filter.

  5. Back To Top    #5

    Re: Is this a good idea?

    Houston, Texas - where it is nice and HOT

    Ok.. on the CYA. I figured with our heat it would be better to be around 50.
    Intex AG 2252 / 10421 Gallons / Vinyl liner
    Pool Set up - May 2016
    2650 gal/hr Intex Krystal Clear Pump- Type B Filter
    Intex SWG
    TFTestkit / SpeedStir Magnetic Stirrer!!! / BBB method only

  6. Back To Top    #6
    Mod Squad jblizzle's Avatar
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    Re: Is this a good idea?

    I think you will have less FC loss raising the CYA some.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
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  7. Back To Top    #7

    Re: Is this a good idea?

    50ish?
    Intex AG 2252 / 10421 Gallons / Vinyl liner
    Pool Set up - May 2016
    2650 gal/hr Intex Krystal Clear Pump- Type B Filter
    Intex SWG
    TFTestkit / SpeedStir Magnetic Stirrer!!! / BBB method only

  8. Back To Top    #8
    techguy's Avatar
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    Re: Is this a good idea?

    Try moving to a 40 CYA. It makes a big difference here. Weather has been in 90-100s during the day with humidity below 20%. I lose about 2-3 PPM per day.

    I just say your note. Try 40 first... then 50 if you still use a bunch. it's hard to take out.
    -- Guy --
    10K gallons in 21' Round 52 inch wall Aqualeader AG, Hayward Power Flow LX 1.5 HP pump motor, Hayward Perflex EC50AC DE filter w/Cellulose, Wide mouth skimmer, 2013 new Diver Dan (craigslist) to replace the faded old Hayward AquaBug. TF-100

  9. Back To Top    #9

    Re: Is this a good idea?

    Thank you. Up to 40 it is.

    I am learning but still unsure of myself. You all are a wonderful!
    Intex AG 2252 / 10421 Gallons / Vinyl liner
    Pool Set up - May 2016
    2650 gal/hr Intex Krystal Clear Pump- Type B Filter
    Intex SWG
    TFTestkit / SpeedStir Magnetic Stirrer!!! / BBB method only

  10. Back To Top    #10
    BoDarville's Avatar
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    Re: Is this a good idea?

    Everyone has given you great advice on this thread. Others have mentioned this, but I will just add for emphasis...CYA is one of those things you want to add gradually until you find your pool's sweet spot. It's kind of like adding salt to a recipe..best done in increments. You can always add more, if needed. But once you add too much, you cannot take it back out.

    Also, if you are adding the granular CYA, keep in mind that it takes about a week for it to register on test results.
    Gold Supporter, TFP Lifetime Supporter, 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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  11. Back To Top    #11

    Re: Is this a good idea?

    Thank you. I added the liquid yesterday. I calculated for 40 from 30 even though my cya reading is half way between 20 and 30.

    Checked today and it is still between 20 and 30 but closer to 30 now. No where near 40.
    Intex AG 2252 / 10421 Gallons / Vinyl liner
    Pool Set up - May 2016
    2650 gal/hr Intex Krystal Clear Pump- Type B Filter
    Intex SWG
    TFTestkit / SpeedStir Magnetic Stirrer!!! / BBB method only

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