Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 9 of 9

Thread: New In-ground Owner w/ SWG

  1. Back To Top    #1

    Join Date
    Jul 2010
    Location
    Calvert County, Maryland
    Posts
    61

    New In-ground Owner w/ SWG

    Hello all, We just opened our In-Ground for swimming today at a balmy 72* Water temp.

    We have an Autopilot Digital.
    1 Main Drain, 1 Skimmer and 2 Return Jets
    Ran some numbers using my TF-100
    FC - 0
    CC - 0
    TC - 0
    Ph - 7.5
    T/A 110
    CH 120
    CYA 47
    Temp at time 70*

    Looks like I need to add Muratic Acid to lower the Ph, then aerate the best I can with my return gets.
    What should I set the output on the Autopilot to? Its a 0% right now and I need to bump that up before the algea begins.

    What else do you have for me?
    Thank in advance!
    29000 Gallon IG vinyl w/ SWG
    Pentair S220T

  2. Back To Top    #2
    linen's Avatar
    Join Date
    Jul 2010
    Location
    Twin Cities, MN
    Posts
    8,649

    Re: New In-ground Owner w/ SWG

    Quote Originally Posted by nikolasmor
    What should I set the output on the Autopilot to? Its a 0% right now and I need to bump that up before the algea begins.
    I am not sure on the % to set it, but you should get some chlorine up to your recommended FC level using bleach/liquid chlorine, then set/adjust the swg to maintain that level.

    Your CYA level is a little low compared the recommended range for swgs of 70-80 ppm.

    By the way, it looks like you need to change the pool details in your sig?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  3. Back To Top    #3

    Join Date
    Jul 2010
    Location
    Calvert County, Maryland
    Posts
    61

    Re: New In-ground Owner w/ SWG

    Looks like I did double duty added the recommended amount and set the purifier to 40% Ouch, Now I am
    31 FC
    .5-1 CC
    7.8 PH
    100 TA
    and 43 CYA
    at 65*
    Looks like I need to add 62 more oz of Stabilizer. This will also lower the Ph so I will wait on the muriatic acid until the CYA is right.
    Also turned the Purifier off for a few days, will test and keep an eye on it.
    29000 Gallon IG vinyl w/ SWG
    Pentair S220T

  4. Back To Top    #4

    TFP Guide

    chiefwej's Avatar
    Join Date
    Jun 2011
    Location
    Tucson
    Posts
    2,853

    Re: New In-ground Owner w/ SWG

    Be careful adding CYA. It doesn't show up on testing for up to a week after adding it. So it's easy to overshoot.
    chiefwej
    Tucson, AZ
    16x36 rectangular (19k) Pebble Tec play pool/spa, Pentair Intelliflo VS 011018, Super II 2hp (spa), Aqua Rite T-15 SWG, Pro Grid 60 DE, Hayward H400 & Heliocol Solar heating, A&A infloor system, fill water w/high CH and TA, 50 ppm borates,TF-100 test kit

  5. Back To Top    #5

    Join Date
    Jul 2010
    Location
    Calvert County, Maryland
    Posts
    61

    Re: New In-ground Owner w/ SWG

    Good thought, I'll test closer to the eyelet and not by the diving board then add 1/2 the recommended amount. Wait a week and retest. In the mean time I will add 1/2 the Ph down recommended.
    29000 Gallon IG vinyl w/ SWG
    Pentair S220T

  6. Back To Top    #6

    Join Date
    Jul 2010
    Location
    Calvert County, Maryland
    Posts
    61

    Re: New In-ground Owner w/ SWG

    Now we are at
    ~80CYA
    7.5 Ph
    13.5 FC
    0 CC
    13.5 TC
    29000 Gallon IG vinyl w/ SWG
    Pentair S220T

  7. Back To Top    #7

    Join Date
    Jul 2010
    Location
    Calvert County, Maryland
    Posts
    61

    Re: New In-ground Owner w/ SWG

    Bumping this as I have algae growth starting at the bottom.

    7.8 Ph
    10 FC
    0 CC
    10 TC
    40 CYA
    120 TA

    I added 128oz Bleach yesterday, running the SWG on 24hr Boost and no difference in 48 hours.

    Thoughts?
    29000 Gallon IG vinyl w/ SWG
    Pentair S220T

  8. Back To Top    #8

    Join Date
    Jul 2010
    Location
    Calvert County, Maryland
    Posts
    61

    Re: New In-ground Owner w/ SWG

    Added 32 oz of CYA as thats all I have on hand..will pick up more tomorrow to bring it up to 80. Extreme sunlight and replacing 12 inches of water since opening warrants this.
    29000 Gallon IG vinyl w/ SWG
    Pentair S220T

  9. Back To Top    #9

    Join Date
    Jul 2010
    Location
    Calvert County, Maryland
    Posts
    61

    Re: New In-ground Owner w/ SWG

    Also dropped the Ph and am aerating to lower the TA
    29000 Gallon IG vinyl w/ SWG
    Pentair S220T

Posting Permissions

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