Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 25

Thread: Shock process and metal sequestering

  1. Back To Top    #1

    Shock process and metal sequestering

    Hello everyone. This is my first year with my pool. I've been trying to clear it up for 2 months now. I was taking advice from my local pool store until I found this site. After reading pool school, I realized I have made plenty of mistakes, taken some bad advice, and wasted a lot of money. Anyway, I have very bad iron stains and green, semi-clear water. Weeks ago, I tried to fix the stains before passing the 3 criteria of the shock process. I got algae when chlorine was low, and decided to read up on this site and start over by passing the shock process, then addressing the stains. Since then I have been keeping my chlorine at shock level (15) based on my last recorded CYA of 30. It has been 5 days, and I still have not passed the overnight test yet. In those 5 days my water went from dark green, to a very milky green, to a near clear green. It seems that many on here achieve a milky blue color first, then it clears. I hate to assume anything, but it seems that maybe the metals in my water are causing it to look clear green. I know I still need to pass the shock process, but I just feel like the opportunity for my water to turn blue has passed. I read that adding a sequestering agent should take the green tint out of clear water. Is it ok for me to add such a thing while keeping my water at shock level? Also, if I am able to add a sequestering agent now to blue up my water, will it have any affect on the AA treatment I plan on doing down the road to remove the stains? Thanks for your time and advice!!
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Shock process and metal sequestering

    With metals, your water isn't likely to turn blue, but it should become very clear green. You can go ahead and add some sequestrant now so that it will turn blue.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3

    Re: Shock process and metal sequestering

    Thanks for the quick response. Just out of curiosity, Is there any negative side effects that come from adding too much of the sequestering agent? Also, will it work against my chlorine levels like ascorbic acid does?
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  4. Back To Top    #4
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Shock process and metal sequestering

    The agents we recommend don't have much chlorine demand, but some of the others do. Adding too much might use up a little chlorine but not much.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  5. Back To Top    #5

    Re: Shock process and metal sequestering

    Thank you much! The products you recommend are not available locally to me. I have some left over Kem-Tek HEDP metal/calcium remover, any idea on chlorine demand regarding this product? Also, the stores around me carry "Metal Free" and "Staintrine" while Wal-Mart has HTH line. Any one better than the other?
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  6. Back To Top    #6
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Shock process and metal sequestering

    Metal Free is not one of the products we recommend. Sequestrants based on HEDP, phosphonic acid, or phosphonic acid derivatives are the most effective.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  7. Back To Top    #7

    Re: Shock process and metal sequestering

    Here are some pictures. Algae, metals, or both?
    Attached Images Attached Images
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  8. Back To Top    #8
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: Shock process and metal sequestering

    Could you post a complete set of water test results?
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  9. Back To Top    #9

    Re: Shock process and metal sequestering

    Well, I have a Taylor K-2006 kit, but I ran out of the Chlorine reagent. I ordered more, and it will get here Monday. Also, I'm not sure if the numbers could be skewed as I have been trying to keep the chlorine level up for the past 5 days, but here they are as of now:
    -PH-7.6 (Was always between 7.0-7.2 before shock)
    -Alkalinity-160 (Was always between 120-130 before shock)
    -FC-13.5-Yesterday morning. (Went to pool store today and they got 8 TC)
    -CC-.5-Yesterday morning. (Pool store can't check)
    -CYA-30-(This was from 2 weeks ago, ran out of this reagent as well)
    -CH-600-(This was from 2 weeks ago as well)
    I have been chlorinating with 6% regular bleach (A ton of it). I still have not passed any of the 3 shock criteria, and will not know until Monday/Tuesday if it passes any. Here are a few more pictures. Thanks for the help.
    Attached Images Attached Images
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  10. Back To Top    #10
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Shock process and metal sequestering

    I think it's some of both. We'll know more once your reagents arrive. Keep the FC up till then.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  11. Back To Top    #11

    Re: Shock process and metal sequestering

    Ok, sounds good. Am I able to keep chlorine tabs in the skimmer while dosing with bleach directly to the pool? Just wondering because I may be gone for longer periods of time than normal next week, and it seems like I need to add bleach every few hours to keep chlorine high. Thanks.
    Also, I read in another thread that a high PH will cause metals to come out of solution. Does this mean that adding a sequestrant now (PH-7.6) would be a waste?
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  12. Back To Top    #12

    Re: Shock process and metal sequestering

    Well, I got my chlorine reagents yesterday and did the overnight test.:
    FC-14.5(last night)------------11.5(This morning)
    CC-(didn't check last night)----1.0(This morning)
    I will continue to shock.
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  13. Back To Top    #13

    Re: Shock process and metal sequestering

    Once again, did not pass the overnight test. I seem to be losing 4ppm of chlorine overnight the past couple nights. When shocking, do you usually see the loss overnight become smaller until you reach less than 1? Or is it possible that I could be losing 4ppm every night and one morning it holds?
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  14. Back To Top    #14
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Shock process and metal sequestering

    It works both ways. Some people see a steady decrease in loss and some people go from losing several ppm per night to zero.

    Have you taken the light out and cleaned behind it?
    Is there anywhere else algae may be hiding?
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  15. Back To Top    #15

    Re: Shock process and metal sequestering

    There is no light in there. However, when I get algae it usually is most visible around the jets, stairs and skimmer. It seems to form in the hidden areas. I took a toothbrush and scrubbed in all the gaps I could find. Maybe today I will take off all the covers and see whats hiding back there. Thanks.
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  16. Back To Top    #16

    Join Date
    Jul 2009
    Location
    Fort Wayne, IN
    Posts
    392

    Re: Shock process and metal sequestering

    is your family swimming at all during the day?
    Theresa and/or Gary

    Complete DIY: 20x40' rectangle. Resin walls, vinyl lined. 33000 gallons. Full width steps. 8' deep. Diving board, slide. Hayward pro series super pump, sand filter. Raypack 336K BTU heater. Main drain, 2 skimmers, 3 returns, 2 amerilite lights with quick change lens Aquamatic auto cover and a partridge in a pear tree.
    Breaking our backs in the hopes that one of our six kids will care for us when we are old ;)

  17. Back To Top    #17

    Re: Shock process and metal sequestering

    Quote Originally Posted by 8corneflakes
    is your family swimming at all during the day?
    No. We have not unfortunately. Trying to get everything in line first.
    Today I took off all of the covers on the jets and skimmer to see if anything was behind. I did find what seemed to be algae. I scrubbed down the areas and it all came off pretty easily. I wouldn't call it "a lot" of algae and most of it was white, but there were some pieces that were still green. Also, there are some plastic strips that are screwed into the stairs (Picture). I took off the screw covers and found some junk in there. I also unscrewed the first five screws to pull the strip back and see if anything was behind. There definitely was. I"m not sure if I should unscrew those strips though, as they seem to be holding my liner down. Am I able to take these off to clean behind?
    Attached Images Attached Images
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  18. Back To Top    #18

    Re: Shock process and metal sequestering

    Lost another 4ppm chlorine overnight. went from FC-21 to FC-17. CC stayed at .5.
    22.5K gal vinylpool -- Tagelus TA-60/60Dsand filter -- Hayward 3/4HP uprate Super Pump

  19. Back To Top    #19
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,333

    Re: Shock process and metal sequestering

    Don't take those strips off. They're holding the liner in place and you don't want it slipping out. That's a major oh no!
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  20. Back To Top    #20

    Join Date
    Jul 2011
    Location
    Tavistock, ON, Canada
    Posts
    33

    Re: Shock process and metal sequestering

    Your pool and mine could be twins!! I am going thru the same exact issues. Please let me know how the things look once you add the sequestrant. I plan on getting some today!!
    Leanne
    18x36 IG Vinyl, Zodiac SWG, 1.5 hp Jacuzzi pump , Sand Filter, installed 2007

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
  •