Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: Big Midday FC loss?

  1. Back To Top    #1

    Join Date
    Jul 2015
    Location
    Central NJ
    Posts
    55

    Big Midday FC loss?

    Today was a sunny day... went from FC of 8 this AM to about a 4 after work.
    Overnight FC loss is just about nothing.
    Is this common? I seem to lose ALOT of FC during the day. My CYA last year was around 80-90, but Im down to about 40-50 this year... so I expected a bit better performance.
    Pool looks clear as can be and healthy as far as I can tell. All tests are within spec.
    PH- 7.5
    TA- 80
    CYA- ~45
    Thoughts?
    16' x 32' Inground Vinyl Pool (17,000 Gallon)
    Hayward Pro Series Sand Filter + 1.5hp Super Pump, Hayward H300 300,000 BTU Heater
    (2) Jandy 3-Way Valves, (1) Variflo XL Multiport
    (2) Returns, (1) Main Drain, (1) Skimmer, (2) StairJets w/ 1.5" Schedule 40 PVC Plumbing

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,085

    Re: Big Midday FC loss?

    You're fine for now. If your overnight loss is as low as you say, you have no problems.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Big Midday FC loss?

    You are actually thinking about it backward ... at a higher CYA level, you would lose a lower % of the FC to the sun each day. So now that your CYA is half of what it was last year, it makes sense that you are losing more FC each day to the sun.
    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
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  4. Back To Top    #4

    Join Date
    Jul 2015
    Location
    Central NJ
    Posts
    55

    Re: Big Midday FC loss?

    Hmmm.. so bump my CYA up somehow?
    16' x 32' Inground Vinyl Pool (17,000 Gallon)
    Hayward Pro Series Sand Filter + 1.5hp Super Pump, Hayward H300 300,000 BTU Heater
    (2) Jandy 3-Way Valves, (1) Variflo XL Multiport
    (2) Returns, (1) Main Drain, (1) Skimmer, (2) StairJets w/ 1.5" Schedule 40 PVC Plumbing

  5. Back To Top    #5
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Big Midday FC loss?

    That is one option. Or just keep doing what you are doing.

    It is surprising that you are seeing that high of a drop up in NJ with your CYA in the 40-50 range.
    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
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •