Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: If CYA is between 30 & 40 so maybe 35?

  1. Back To Top    #1

    Join Date
    Jul 2014
    Location
    NJ
    Posts
    46

    If CYA is between 30 & 40 so maybe 35?

    Since my CYA is between 30 & 40, I have been keeping my target Chlorine at 5. BUT then it seems to need chlorine every other day, chlorine will go down till about a 3 on the second day. Is there any problem doing it this way? I check the chlorine ever day, so I am not going lower. So just wanted to make sure that it is ok to "aim high" with the chlorine.
    5,700 gallon, Carribean Isle 15x52 Round Above Pool.
    Cartridge Filter.
    Installed Fall, 2014.
    North New Jersey
    Using the TF100 test

  2. Back To Top    #2

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: If CYA is between 30 & 40 so maybe 35?

    You are doing that perfectly. You could not be more tuned in to TFPC.

    My bet is your water looks great??
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  3. Back To Top    #3

    Join Date
    Apr 2015
    Location
    South Central PA
    Posts
    296

    Re: If CYA is between 30 & 40 so maybe 35?

    I'm in the same situation- I assume CYA=40, and add chlorine every evening to reach FC=6 (even is FC=4.5, as it usually does), so I never get near the 3 minimum....I may be a little aggressive by targeting higher...
    20000 gallon vinyl liner in ground pool
    16' X 34' rectangular diving pool
    Hayward Pro Grid DE Filter
    Hayward 1 hp Super Pump
    TF-100 Test Kit Stenner 45MPHP10

  4. Back To Top    #4

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,083

    Re: If CYA is between 30 & 40 so maybe 35?

    No, you are not being too aggressive.....either of you. It is FAR FAR worse to allow your FC to continually dip below the mins TFP has set.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  5. Back To Top    #5

    In the Industry

    Donldson's Avatar
    Join Date
    Jun 2009
    Location
    NW Ohio
    Posts
    2,637

    Re: If CYA is between 30 & 40 so maybe 35?

    I can't really improve on Dave's advice. I only want to add that you should always round up your CYA measurement to the 10s. Even if it goes almost all the way up to 30, if it doesn't hit the 30 line call your CYA 40. As Dave said, there is far more risk from running low than running a little high.
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

  6. Back To Top    #6
    DaninFLA's Avatar
    Join Date
    Apr 2015
    Location
    Sarasota, FL
    Posts
    1,011

    Re: If CYA is between 30 & 40 so maybe 35?

    CYA isn't that accurate of a test, so to try and figure out between the two is just trying to apply more precision than available. just round up to 40 and base your FC on that.

    I keep my FC a little above the target amount, a few ppm isn't going to hurt anything
    Dan
    9,000 gallon in-ground Saltwater pool, plaster, cartridge filer, 1.0 hp pump, Hayward T-15 SWCG, TF-100
    Pool School - Chlorine / CYA Chart; Pool School - Test Kits Compared;

  7. Back To Top    #7

    Join Date
    Jul 2014
    Location
    NJ
    Posts
    46

    Re: If CYA is between 30 & 40 so maybe 35?

    Great thanks! Yes my water is crystal clear, and everyone is asking me, because I a first time pool owner if I am having trouble, told them all about TFP and I think I may have "recruited" a few people.. LOL
    5,700 gallon, Carribean Isle 15x52 Round Above Pool.
    Cartridge Filter.
    Installed Fall, 2014.
    North New Jersey
    Using the TF100 test

Posting Permissions

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