Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: dealing with Algae in salt water pool and need to balance before SLAM

  1. Back To Top    #1

    Join Date
    Jul 2015
    Location
    Sault ste Marie, Ontario, Canada
    Posts
    21

    dealing with Algae in salt water pool and need to balance before SLAM

    Hi there,
    We just finished construction of our pool last fall - just in time to close it. It is a SWG pool but the SWG has not yet been installed. Our pool contractor is coming to install the SWG as soon as we have the pool opened and ready to go. We had a very difficult time getting the water circulating - could not yet it primed. We finally succeeded today (yeah!!). Our pool is a disgusting SWAMP. We need to SLAM it. Looking for advise on how to do that give our situation (no SWG at the moment but will have one very soon). I measured chemicals using our Taylor testing kit. Here are the results:

    FC = 0 (no surprise there)
    pH = 7.2
    TA = 40 ppm
    CYA = 0? (or less than 30 anyways - could see clear down to the black dot in the testing kit when the tester was full.

    I did not bother measuring CC or CH (my thought was if there is no FC, how could their be CC or CH? Not sure if that is correct)

    So I believe my pH is at a good level as I understand it will go up slightly when I SLAM the pool.

    I think I need to raise the CYA and TA before SLAMing - is that correct?

    If so, pool math is telling me I need to add 300 oz of baking soda to raise TA to 60 and 175+ oz of stabilizer to raise CYA to 60 (assuming CYA is at 30 which is probably a high estimate).

    Also, my pool contractor says NOT to use chlorine to shock the pool because we are moving to SWG. What should I use?

    He is suggesting shocking the pool and once it i has been shocked add a good quality algecide.

    Am I on the right track?
    22' x 44' rectangular IG vinyl liner swimming pool with SWG, 10' depth in deep end, 44,000 gallons. Pump: Pentair Superflow 1.5 HP High Performance Pump. Filter: Pentair Sand Dollar Filter. Location: Ontario, Canada

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,492

    Re: dealing with Algae in salt water pool and need to balance before SLAM

    You really wouldn't want the SWG on during a SLAM anyway, so - ignore TA

    What does your pool builder thing a salt water chlorine generator creates?

    Bring CYA to 30

    SLAM away, use liquid chlorine


    No algecide. Oh, and for giggles if you go by a pool store just read the fine print on the directions on bottles of algecide. Almost all say do not add to pools with active algae growth. Algecide is a preventative, not a cure. Chlorine is the cure.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  3. Back To Top    #3

    Join Date
    Jul 2015
    Location
    Sault ste Marie, Ontario, Canada
    Posts
    21

    Re: dealing with Algae in salt water pool and need to balance before SLAM

    Thank you! Just to confirm: ignore TA for now, but bring up CYA?
    22' x 44' rectangular IG vinyl liner swimming pool with SWG, 10' depth in deep end, 44,000 gallons. Pump: Pentair Superflow 1.5 HP High Performance Pump. Filter: Pentair Sand Dollar Filter. Location: Ontario, Canada

  4. Back To Top    #4
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,492

    Re: dealing with Algae in salt water pool and need to balance before SLAM

    Quote Originally Posted by Kfremlin View Post
    Thank you! Just to confirm: ignore TA for now, but bring up CYA?
    Yes, ignore TA bring CYA to 30

    Does your pool,builder also have a retail store where he sells chemicals?
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  5. Back To Top    #5

    Join Date
    Jul 2015
    Location
    Sault ste Marie, Ontario, Canada
    Posts
    21

    Re: dealing with Algae in salt water pool and need to balance before SLAM

    Yes - he sells chemicals out of his house.
    22' x 44' rectangular IG vinyl liner swimming pool with SWG, 10' depth in deep end, 44,000 gallons. Pump: Pentair Superflow 1.5 HP High Performance Pump. Filter: Pentair Sand Dollar Filter. Location: Ontario, Canada

  6. Back To Top    #6
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,492

    Re: dealing with Algae in salt water pool and need to balance before SLAM

    Quote Originally Posted by Kfremlin View Post
    Yes - he sells chemicals out of his house.
    I had a feeling he had a financial interest in what you used.....
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

Posting Permissions

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