Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 30

Thread: Balancing water - where to start?

  1. Back To Top    #1
    Razorhog's Avatar
    Join Date
    Jun 2013
    Location
    Northeast Arkansas
    Posts
    387

    Balancing water - where to start?

    Got the pool opened, it was fairly green but all debris are out and the water is clear with a green tint. First test results:
    FC = 0
    CYA = 0
    TA = 80
    CH = forgot to test. Fiberglass pool, I will adjust if I need to
    PH = 7

    So should I start by adding CYA to get it to about 30ppm and then add enough bleach to begin the SLAM process? Or start with PH?
    SLAM * Chlorine/CYA Chart * Pool Math * Pool School
    17.5k gal IG Fiberglass, Triton II TR60 Sand Filter, Jacuzzi Magum Force Pump 1.5 hp, 3/4 hp booster, Polaris 280, TF-100 Test Kit with Speed Stir

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: Balancing water - where to start?

    Quote Originally Posted by Razorhog View Post
    Got the pool opened, it was fairly green but all debris are out and the water is clear with a green tint. First test results:
    FC = 0
    CYA = 0
    TA = 80
    CH = forgot to test. Fiberglass pool, I will adjust if I need to
    PH = 7

    So should I start by adding CYA to get it to about 30ppm and then add enough bleach to begin the SLAM process? Or start with PH?
    pH & CYA can be done at the same time. Get a sock of CYA weigned for 30 CYA in the skimmer while you bring the pH up.

    Then SLAM based on 30 CYA
    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
    Defgufman's Avatar
    Join Date
    Mar 2015
    Location
    Savannah GA
    Posts
    577

    Re: Balancing water - where to start?

    You can't test for ph once the slam starts so I'd adjust that first.
    Inground 13,200 gal Vinyl, Pentair 3/4 hp pump, Pentair Sand Dollar filter, Polaris 280

    Pool School, Pool Math, CYA to FC ratio chart, Testing Kits

  4. Back To Top    #4
    Razorhog's Avatar
    Join Date
    Jun 2013
    Location
    Northeast Arkansas
    Posts
    387

    Re: Balancing water - where to start?

    Thanks!!
    SLAM * Chlorine/CYA Chart * Pool Math * Pool School
    17.5k gal IG Fiberglass, Triton II TR60 Sand Filter, Jacuzzi Magum Force Pump 1.5 hp, 3/4 hp booster, Polaris 280, TF-100 Test Kit with Speed Stir

  5. Back To Top    #5
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Balancing water - where to start?

    Quote Originally Posted by Razorhog View Post
    Got the pool opened, it was fairly green but all debris are out and the water is clear with a green tint. First test results:
    FC = 0
    CYA = 0
    TA = 80
    CH = forgot to test. Fiberglass pool, I will adjust if I need to
    PH = 7

    So should I start by adding CYA to get it to about 30ppm and then add enough bleach to begin the SLAM process? Or start with PH?
    I'd say neither. You ought to know your CH level, just in case it's really high and you need to drain some off. Why treat a bunch of water and then turn around and dump it?

    Next up, with no detectable CYA and a green pool, there's a chance you have Ammonia from CYA decomposition. I'd start by adding 10FC to that pool - shock level with zero CYA - and let it mix 30 minutes, ideally in the evening so you can rule out sunlight. Then test FC & CC. If CC has jumped way up and FC is all gone, you've got whatever it is that destroys CYA in there. It's going to take a whole bunch of bleach to get ahead of it.

    That's when you stop and evaluate things. Is water cheap and plentiful, or are you on a well? Is there a danger of floating the pool? Did the CH test also indicate that a partial drain was called for? You can only make good decisions when you have all the facts. And we can only give good advice when we know all the facts.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  6. Back To Top    #6
    Razorhog's Avatar
    Join Date
    Jun 2013
    Location
    Northeast Arkansas
    Posts
    387

    Re: Balancing water - where to start?

    Ok I'll test CH


    SLAM * Chlorine/CYA Chart * Pool Math * Pool School
    17.5k gal IG Fiberglass, Triton II TR60 Sand Filter, Jacuzzi Magum Force Pump 1.5 hp, 3/4 hp booster, Polaris 280, TF-100 Test Kit with Speed Stir

  7. Back To Top    #7
    Razorhog's Avatar
    Join Date
    Jun 2013
    Location
    Northeast Arkansas
    Posts
    387

    Re: Balancing water - where to start?

    CH = 90

    One thing I should add is that the pool service put a couple tri-chlor pucks in the skimmer when they opened the pool, so I've got a bucket of them to use. Should I raise the CYA to a lower level like 20 so that after the SLAM I can continue to use the pucks for a while or when gone on vacation?
    SLAM * Chlorine/CYA Chart * Pool Math * Pool School
    17.5k gal IG Fiberglass, Triton II TR60 Sand Filter, Jacuzzi Magum Force Pump 1.5 hp, 3/4 hp booster, Polaris 280, TF-100 Test Kit with Speed Stir

  8. Back To Top    #8
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Balancing water - where to start?

    Quote Originally Posted by Razorhog View Post
    CH = 90

    One thing I should add is that the pool service put a couple tri-chlor pucks in the skimmer when they opened the pool, so I've got a bucket of them to use. Should I raise the CYA to a lower level like 20 so that after the SLAM I can continue to use the pucks for a while or when gone on vacation?
    That sounds like an excellent idea. You might have as much as 20 CYA already in the water, and targeting 20 now will keep you below 40 total. I'd still go with a test dose of bleach to see what happens to the CC level. If you have Ammonia, it takes a lot of bleach. A couple hundred bucks' worth if it's really bad. Draining some water might be cheaper than that.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  9. Back To Top    #9
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: Balancing water - where to start?

    Richard, you make a very good point about the CYA/ammonia issue. We have seen several this year and I wasn't even thinking about it.

    A test with bleach is a good idea!!
    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

  10. Back To Top    #10
    Razorhog's Avatar
    Join Date
    Jun 2013
    Location
    Northeast Arkansas
    Posts
    387

    Re: Balancing water - where to start?

    Put in bleach to raise FC to 13. 30 minutes later FC is 3 and CC is 6. Rut-roh
    SLAM * Chlorine/CYA Chart * Pool Math * Pool School
    17.5k gal IG Fiberglass, Triton II TR60 Sand Filter, Jacuzzi Magum Force Pump 1.5 hp, 3/4 hp booster, Polaris 280, TF-100 Test Kit with Speed Stir

  11. Back To Top    #11
    Razorhog's Avatar
    Join Date
    Jun 2013
    Location
    Northeast Arkansas
    Posts
    387

    Re: Balancing water - where to start?

    How to proceed?


    SLAM * Chlorine/CYA Chart * Pool Math * Pool School
    17.5k gal IG Fiberglass, Triton II TR60 Sand Filter, Jacuzzi Magum Force Pump 1.5 hp, 3/4 hp booster, Polaris 280, TF-100 Test Kit with Speed Stir

  12. Back To Top    #12
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: Balancing water - where to start?

    Quote Originally Posted by Razorhog View Post
    Put in bleach to raise FC to 13. 30 minutes later FC is 3 and CC is 6. Rut-roh
    Rut-roh is right... Richard hit the mark, it would appear you do have ammonia in the water. You can go by an aquarium supply store and pick up an ammonia test kit if you want to verify it, or you can do what you will need to do anyway - start SLAM'n the pool now. Bleach/liquid chlorine, keep raising it up to shock level and retesting because ammonia consumes a lot of chlorine.
    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

  13. Back To Top    #13

    Re: Balancing water - where to start?

    14,000 Gal IG Pool/500 Gal Attached Spa
    Pentair Whisperflow 1hp Single Speed Pump
    Sta-Rite Posi-Flo PTM-135 Cartridge Filter
    Hayward H400 Natural Gas Heater

  14. Back To Top    #14
    Razorhog's Avatar
    Join Date
    Jun 2013
    Location
    Northeast Arkansas
    Posts
    387

    Re: Balancing water - where to start?

    Tested again. FC 4, CC 5.


    SLAM * Chlorine/CYA Chart * Pool Math * Pool School
    17.5k gal IG Fiberglass, Triton II TR60 Sand Filter, Jacuzzi Magum Force Pump 1.5 hp, 3/4 hp booster, Polaris 280, TF-100 Test Kit with Speed Stir

  15. Back To Top    #15
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,495

    Re: Balancing water - where to start?

    OK, bring it back up to shock level, test & repeat. Give it time for the water to circulate - say at least 30 minutes.
    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

  16. Back To Top    #16
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Balancing water - where to start?

    Quote Originally Posted by Razorhog View Post
    How to proceed?


    Sent from my iPhone using Tapatalk
    Well... how wet is the ground around you? Meaning: are there ponds and streams full of water? Do people with basements have to have a sump pump? If the ground water is close to the surface, you run the danger of floating the pool, especially since it's fiberglass and a lot lighter than a concrete pool.

    If there isn't much danger of floating the pool and you don't know what's hiding beneath the green, I'd set things up to vacuum to waste. That means the pump sucks the water up through the vacuum and spits it out the backwash port. Any sludge on the bottom gets removed quickly. It also lowers the water level, and you can then refill it with fresh and you'll have less Ammonia to deal with. You don't want to empty the whole pool anyway, vacuuming would probably only lower the water a foot or so.

    You could just go with the standard SLAM process and forget about replacing any water.

    You're also in the enviable position of having very low Calcium Hardness. That means you could use Cal-hypo shock powder to kill the algae and eradicate the Ammonia. Not sure if it will work out cheaper or not, but you'll get fewer strange looks buying a pail of pool chlorine than you will buying out the whole shelf of bleach at Sam's Club!

    The choice is really yours. Once the Ammonia is gone, no matter what route you choose, then the algae killing is just a SLAM.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  17. Back To Top    #17
    Razorhog's Avatar
    Join Date
    Jun 2013
    Location
    Northeast Arkansas
    Posts
    387

    Re: Balancing water - where to start?

    I'll probably go the cal hypo route. Ground is completely saturated here.


    SLAM * Chlorine/CYA Chart * Pool Math * Pool School
    17.5k gal IG Fiberglass, Triton II TR60 Sand Filter, Jacuzzi Magum Force Pump 1.5 hp, 3/4 hp booster, Polaris 280, TF-100 Test Kit with Speed Stir

  18. Back To Top    #18
    Razorhog's Avatar
    Join Date
    Jun 2013
    Location
    Northeast Arkansas
    Posts
    387

    Re: Balancing water - where to start?

    SLAM * Chlorine/CYA Chart * Pool Math * Pool School
    17.5k gal IG Fiberglass, Triton II TR60 Sand Filter, Jacuzzi Magum Force Pump 1.5 hp, 3/4 hp booster, Polaris 280, TF-100 Test Kit with Speed Stir

  19. Back To Top    #19
    Razorhog's Avatar
    Join Date
    Jun 2013
    Location
    Northeast Arkansas
    Posts
    387

    Re: Balancing water - where to start?

    SLAM * Chlorine/CYA Chart * Pool Math * Pool School
    17.5k gal IG Fiberglass, Triton II TR60 Sand Filter, Jacuzzi Magum Force Pump 1.5 hp, 3/4 hp booster, Polaris 280, TF-100 Test Kit with Speed Stir

  20. Back To Top    #20

    TFP Guide

    Azgirl71's Avatar
    Join Date
    Apr 2015
    Location
    Sierra Vista, Az
    Posts
    2,586

    Re: Balancing water - where to start?

    Wow what a difference! Keep at it!
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

Page 1 of 2 12 LastLast

Posting Permissions

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