Become a TFP Supporter Welcome to our new server and new forum software. If you have problems logging in to the new system, you should try resetting your password. Click HERE to do that. Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 25

Thread: Newbie Need help with Combined Chlorine

  1. #1
    Senior Member
    Join Date
    May 2012
    Posts
    165

    Newbie Need help with Combined Chlorine

    So I just opened the pool last week. I have been depending on the pool store for pool help the last 3 years. I really liked reading about the BBB Method, but have not used it yet. Please help convert me to the BBB. I had combined chlorine and the pool store told me to add cya and 8 lbs. of shock. Well the water looks nice, but I still have combined chlorine. I would like to convert to the BBB now and also treat the CC. Also just got a new taylor 2005k testing kit to try to have a better handle on the pool.

    By the way this forum is really an awesome resource for people like me.

    PH 7.2
    TA 130
    FC 2.0ppm
    TC 5.0ppm
    CC 3.0ppm
    CYA is below 30ppm
    21,500 Gallon Vinyl liner pool
    Hayward 2 HP pump 2" Pvc pipes
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  2. #2
    Administrator JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    31,182

    Re: Newbie Need help with Combined Chlorine

    Welcome to TFP!

    You need to shock the pool the correct way, see our directions in Pool School.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    TFP Admin. Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    16,368

    Re: Newbie Need help with Combined Chlorine

    Ideally you would want to get your CYA to at least 30ppm and then follow the Shocking Your Pool process using liquid chlorine.

    Also note that you would be best served to add the FAS-DPD chlorine test (K-1515-A) to your K-2005 kit (this is why we recommend the K-2006). This will allow you to measure FC over 5ppm.
    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, Dolphin Diagnostic Robotic Cleaner, TF-100 test kit w/ SpeedStir
    Gone: Hayward RS1500 pump, undersized DIY solar heater, Dolphin Dynamic Robotic Cleaner
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL

  4. #4
    Senior Member
    Join Date
    May 2012
    Posts
    165

    Re: Newbie Need help with Combined Chlorine

    So about how many gallons of bleach will I need to have on hand to overtake the CC. Also do I increase the cya by turning up my automatic chlorinator? Thanks for the hep
    21,500 Gallon Vinyl liner pool
    Hayward 2 HP pump 2" Pvc pipes
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  5. #5
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    16,368

    Re: Newbie Need help with Combined Chlorine

    Grudgingly, yes turning up your chlorinator will increase the CYA a little more quickly ... although still pretty slowly.

    Do you plan to continue to use the puck in the chlorinator? If so, do you understand the relationship of CYA to the required FC levels?

    As far as the number of bottles of bleach ... 46 the answer to everything
    Really no way to know ... it take as many as it takes ... just keep adding bleach to stay above shock level.
    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, Dolphin Diagnostic Robotic Cleaner, TF-100 test kit w/ SpeedStir
    Gone: Hayward RS1500 pump, undersized DIY solar heater, Dolphin Dynamic Robotic Cleaner
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL

  6. #6
    Senior Member
    Join Date
    May 2012
    Posts
    165

    Re: Newbie Need help with Combined Chlorine

    Thanks for your help Jason.

    If I do not use the hockey pucks what should I use? Yesterday I added about 2lbs of cya to the skimmers. As for the relationship between cya and chlorine from what I understand cya keeps the chlorine from dissolving, right? As far a bleach I am going to walmart do I need 10 gallons, 20, 30.... 75? I am looking for a rough number so I do not have to keep running to the store it is about 12 miles from my house.
    21,500 Gallon Vinyl liner pool
    Hayward 2 HP pump 2" Pvc pipes
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  7. #7
    Senior Member Isaac-1's Avatar
    Join Date
    May 2010
    Location
    SW Louisiana
    Posts
    3,374

    Re: Newbie Need help with Combined Chlorine

    CYA buffers active chlorine in the water and helps prevent its loss when exposed to UV/sunlight, this is a double edged sword, you want it high enough to help maintain free chlorine levels in sunlight, but not so high that it prevents that same chlorine from being effective killing things that try to grow in your water. If you read over pool school in the upper right corner of any page here it will help explain the matter in more detail. You should also be aware it can take a week or more for CYA to show up on the test after it is added to the water.

    Ike

    p.s. one more question, what kind of "shock" did you use, different brands contain different chemicals, all have secondary effects
    Indoor 20x40 36,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis panel roof top solar heat with Aquasolar controller, Dolphin Diagnostic Pro Robot Cleaner. Also LMI metering chlorine dispenser pump and soon to be connected UV Ozonator and now Hot Spring Jetsetter standalone spa
    I use and endorse the TFtestKits TF-100 from http://tftestkits.net

  8. #8
    Senior Member
    Join Date
    May 2012
    Posts
    165

    Re: Newbie Need help with Combined Chlorine

    The shock I use is bioguard burnout 3 58% calcium hypochlorite.

    I have been reading the pool school stuff and can't figure out how much shock to add. At the pool store they say just add 8 bags. I have been trying to use the calculator with my numbers and it says to add 96oz of bleach. I don't see anything on the calculator about TC or CC, so I am sort of stuck. I don't know much about pools and am trying to learn. Am I missing a chart or why is this so difficult for me?
    21,500 Gallon Vinyl liner pool
    Hayward 2 HP pump 2" Pvc pipes
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  9. #9
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    16,368

    Re: Newbie Need help with Combined Chlorine

    I think you should step back and start reading Pool School from the top before adding more chemicals. You need to grasp what the different acronyms mean and what they are in the pool chemistry.

    Cal-hypo adds calcium (CH) and at too high levels this too will cause problems.
    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, Dolphin Diagnostic Robotic Cleaner, TF-100 test kit w/ SpeedStir
    Gone: Hayward RS1500 pump, undersized DIY solar heater, Dolphin Dynamic Robotic Cleaner
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL

  10. #10
    Senior Member
    Join Date
    May 2012
    Posts
    165

    Re: Newbie Need help with Combined Chlorine

    Jason,
    My CH measured at 180 ppm. I have been rereading through the pool school section. Any other advice would be appreciated.
    21,500 Gallon Vinyl liner pool
    Hayward 2 HP pump 2" Pvc pipes
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  11. #11
    Junior Member
    Join Date
    May 2012
    Posts
    11

    Re: Newbie Need help with Combined Chlorine

    Quote Originally Posted by doublewide6
    The shock I use is bioguard burnout 3 58% calcium hypochlorite.

    I have been reading the pool school stuff and can't figure out how much shock to add. At the pool store they say just add 8 bags. I have been trying to use the calculator with my numbers and it says to add 96oz of bleach. I don't see anything on the calculator about TC or CC, so I am sort of stuck. I don't know much about pools and am trying to learn. Am I missing a chart or why is this so difficult for me?

    I'm a noob too but I'll try to help.

    You'll end up needing/wanting the FAS-DPD test that comes with the Taylor K-2006.

    There isn't TC or CC on the calculator because with properly balanced water your TC should be equal to your FC and you CC should be zero. If either of those isn't true then you need to shock so the actual TC and CC numbers don't change what needs to be done to the pool.

    I think having a product called "shock" confuses many people. I prefer to look at shocking as the state of having the pool water FC at or above shock levels for a certain amount of time. If the pool needs to be shocked then putting the correct amount of "shock" in the pool 1 time will seldom fix the problem.

    The reason to switch to bleach is that it simply cuts down on the chances of adding something that you don't need. In your case CH. Once your CH is where it needs to be then switch to bleach for your chlorine needs.
    ............................................................ ........................
    Kayak Pool - 12 ft. x 24 ft. rectangular, 5˝ ft. deep end
    Frog System, Sta-Rite-Modular Media Cartridge Filter, Pentair 1 H.P. pump
    AquaPRO Pro500 heat pump & Automatic AutoGuard™ Pool safety cover
    ............................................................ ........................

  12. #12
    Senior Member
    Join Date
    May 2012
    Posts
    165

    Re: Newbie Need help with Combined Chlorine

    Here are the results from the pool store's computerized results

    fc 1.9
    tc 5.8
    cc 3.9
    ph 7.5
    hardness 227
    Alkalinity 102
    cya 33ppm

    They are calling for 15lbs of shock.

    How do I figure out how much bleach to add instead of shock?
    21,500 Gallon Vinyl liner pool
    Hayward 2 HP pump 2" Pvc pipes
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  13. #13
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    20,606

    Re: Newbie Need help with Combined Chlorine

    Use the Pool Calc. Once you enter all the info above, then the targets, it'll tell you how much to add. Since your CYA is 33 (lets call it 40) your shocking level will be 16 ppm FC. That's your target. That's 4˝ gallons of bleach. The biggest issue you're gonna have is that you're not going to be able to hold it at the shock level as you should without a good test kit.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 1.5hp Dynamo pump. 24" Pentair Sand Dollar Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit
    You can stop SLAMing your pool when you pass the OCLT (You lose 1ppm or less FC overnight, & You have .5ppm CC's or less) & your water is clear.

  14. #14
    Senior Member
    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    2,840

    Re: Newbie Need help with Combined Chlorine

    Quote Originally Posted by doublewide6
    They are calling for 15lbs of shock.
    Did they ask how big your pool is, or just throw that out there? Adding 15 lbs of 58% cal-hypo would skyrocket your FC by 47 ppm, which is way too high, and wouldn't hold long enough in a one-time application anyway.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II T100 Sand Filter, CompuPool CPCS48 SWG, Borates at 50 ppm, TF-100 test kit

  15. #15
    Senior Member Isaac-1's Avatar
    Join Date
    May 2010
    Location
    SW Louisiana
    Posts
    3,374

    Re: Newbie Need help with Combined Chlorine

    Depending on what they are calling shock that could cause some real headaches, well really regardless of what they are calling shock, it can.

    If they are selling Cal-Hypo as "shock" it would raise your CH along with adding chlorine, yours is in a good range now, but much more and it would be time to worry.

    If they are selling Dichlor or Tri-Chlor then it will add CYA as well as chlorine, yours is just about right now, 15 pounds of dichlor would put your CYA well above an acceptable range and you would likely end up having to drain a large portion of your water to fix the problem.
    Indoor 20x40 36,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis panel roof top solar heat with Aquasolar controller, Dolphin Diagnostic Pro Robot Cleaner. Also LMI metering chlorine dispenser pump and soon to be connected UV Ozonator and now Hot Spring Jetsetter standalone spa
    I use and endorse the TFtestKits TF-100 from http://tftestkits.net

  16. #16
    Senior Member
    Join Date
    May 2012
    Posts
    165

    Re: Newbie Need help with Combined Chlorine

    Bama,
    This is most likely a stupid question, how did you calculate that my target amount should be 16 for FC? I was able to use 16 as my target and figure out that I needed 4.5 gallons of bleach using the calculator. I am going to see if any of the pool stores carry that test kit.
    21,500 Gallon Vinyl liner pool
    Hayward 2 HP pump 2" Pvc pipes
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

  17. #17
    Senior Member
    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    2,840

    Re: Newbie Need help with Combined Chlorine

    Quote Originally Posted by Bama Rambler
    Use the Pool Calc. Once you enter all the info above, then the targets, it'll tell you how much to add.
    www.poolcalculator.com
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II T100 Sand Filter, CompuPool CPCS48 SWG, Borates at 50 ppm, TF-100 test kit

  18. #18
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    20,606

    Re: Newbie Need help with Combined Chlorine

    I looked at the chlorine/cya chart in pool school. It lists the shock values associated with the amount of CYA you have in the water. Given that you have as much CC's as you have, you need to perform the shock process.

    Nobody will carry the TF-100 but a very (and I mean very) few stores will carry the K-2006. Don't let them sell you the K-2005 and tell you it's the same. Make sure the kit has the FAS-DPD chlorine test and not just the DPD test.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 1.5hp Dynamo pump. 24" Pentair Sand Dollar Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit
    You can stop SLAMing your pool when you pass the OCLT (You lose 1ppm or less FC overnight, & You have .5ppm CC's or less) & your water is clear.

  19. #19
    Senior Member frogabog's Avatar
    Join Date
    Jul 2010
    Location
    Portland, Oregon
    Posts
    1,591

    Re: Newbie Need help with Combined Chlorine

    It sounds like you may not have set up the pool calculator yet. At the bottom of the pool calculator, set your pool stats. Choose TFP for a source, surface=plaster, and chlorine=bleach. It sets the calculator for the values associated with those parameters.

    Another point about the test kit; if you're not sure if it has a FAS-DPD test, look for a little bottle of POWDER. If there's no powder in the kit, only drops... it's not the one you need.
    Where kids swim in 54 degree water, turn blue, and giggle happily cuz they got a POOL!
    Year 3 BBB -15' x 48" Intex Metal Frame - Was using (2) 1000gph Intex cartridge filters (see Full time pumping Intex). 2012, converted to 1600gph and sand filter+SWG = Sand filter love affair!
    Don't waste time and energy looking for a better value on test kits, the TF100 is the best deal around. I did the looking and spent the extra money, but you don't have to make the same mistake. Just go here: TFTestkits. I use Pool Calculator for min/max, and shocking chlorine levels.

  20. #20
    Senior Member
    Join Date
    May 2012
    Posts
    165

    Re: Newbie Need help with Combined Chlorine

    Bama,
    Thanks for the info that helps me out. I am going to order the K-1515A to add to my k-2005 kit. Is there anything else I would need as far as testing kits? So what should I do in the mean time with my pool? Add the needed bleach, shock with burnout 3, or wait until I get my test kit?
    21,500 Gallon Vinyl liner pool
    Hayward 2 HP pump 2" Pvc pipes
    Hayward sand filter, Compupool CPSC 48 SWG
    12mil solar cover and reel

Posting Permissions

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