+ Reply to Thread
Results 1 to 7 of 7

Thread: New IG vinyl liner - initial results

  1. #1
    Join Date
    Mar 2006
    Posts
    16

    Default New IG vinyl liner - initial results

    I have a 16X40 IG pool, about 25,000 gallons. The liner went in Tuesday night and it took nearly two days to fill it. (This is in metro Atlanta. It'll be near 90 today, but my pool's in the shade).

    I shocked the pool with 15 quarts of bleach.

    To adjust the initial ph and alkalinity, I added borax and baking soda. I'm still adjusting. I added a tri-c puck for stabilizer.

    My numbers this morning:

    ph - 7.5
    alk - 40
    fc - 6 ppm
    cc - 0
    tc - 6 ppm
    cya - (before the addition of a 3-inch puck)

    Questions:

    1) How much stabilizer will I get out of a 3-inch puck?

    2) How much more baking soda should I add to increase the alk - and about what should my target alk be: 100 ppm? Last year my alk was about 150 and ph stayed at about 7.5

    3) Am I past the shocking stage? That is, once I've established enough stabilizer to maintain my bleach, can I just add enough bleach to keep my FC sufficient or do I need to shock for longer?


    Thanks,

    Z

  2. #2
    CarlD's Avatar
    CarlD is offline SuperMod Emeritus Vortex Adjuster CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars
    Join Date
    Dec 1969
    Location
    North Central NJ
    Posts
    6,607

    Default Re: New IG vinyl liner - initial results

    New water: FC and TC = 6ppm, no CYA yet...
    No need to shock. You should have gotten FC of 7.8ppm, but it must have metabolized something--and no CC measured. That's good.

    I don't quite know how to compute the amount of CYA 1 puck will add to a pool. What I would do is use pucks (if you must) in a floater and measure CYA weekly, at a minimum. When it passes 30ppm, stop.

    Or you can buy CYA directly. Figure, from the package, how much you need to reach your target in your pool, then use 1/4 to 1/2 what you computed. Add it and wait a week to test CYA. (use the rules on putting it in a sock, or in the skimmer and not backwashing--search the forum).

    Alk: I like to add 1lb via the skimmer, wait a day, test, and add another pound, and keep it up until TA passes 100. 150 is FINE in a vinyl pool--I like 180 to be my max before I take action to lower it ...Concrete pool owners--your max is 125.

    But overall, I think your pool is looking terrific and you are doing everything right to start off with healthy water! Well Done!
    Carl

  3. #3
    Join Date
    Mar 2006
    Posts
    16

    Default Re: New IG vinyl liner - initial results

    Carl D:

    The pool came with chlorinator/feeder that takes pucks. The previous owner had a leftover supply of pucks, so I'll use that to get my CYA - unless it makes more sense to just buy it and use it straight.

    Thanks for the advice. It's great that everyone is so willing to share their knowledge.

    The pool came with the house we bought last year. It's the first time I've ever maintained a pool.

    Most of my knowledge has come from the discussions on this site. I relied on a pool service for about six weeks last year, just to understand how my system worked. I supplemented that by reading here.

    Again, thanks for looking at my numbers.

  4. #4
    aylad's Avatar
    aylad is offline SuperMod Emeritus Burfle Ringer aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars aylad 4 stars
    Join Date
    Dec 1969
    Location
    Northwest Lousiana
    Posts
    4,757

    Default Re: New IG vinyl liner - initial results

    Carl's got you on the right track, and my kudos too, for doing your homework. The only piece of advice I'd add would be to add a small amount of straight stabilizer (maybe enough of a dose for 10-20 ppm?) as kind of a "loading dose", then let your pucks bring it up to where you want it. The problem is that it will take several weeks before the pucks are able to put enough CYA in the water to actually hold a chlorine residual.

    Janet

  5. #5
    CarlD's Avatar
    CarlD is offline SuperMod Emeritus Vortex Adjuster CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars CarlD 4 stars
    Join Date
    Dec 1969
    Location
    North Central NJ
    Posts
    6,607

    Default Re: New IG vinyl liner - initial results

    I didn't realize you had an in-line chlorinator. Use that instead, of course, but watch your CYA.
    Carl

  6. #6
    mbar's Avatar
    mbar is offline Lifetime Member Whizbang Spinner mbar 3 stars mbar 3 stars mbar 3 stars mbar 3 stars
    Join Date
    Dec 1969
    Location
    Ashland, PA
    Posts
    1,009

    Default Re: New IG vinyl liner - initial results

    I have an in-line feeder too, and I only use it when I am going to be away. I like to start my pool off with a cya of 30, so that when I use the pucks I don't worry about the cya getting too high. It is nice to have as a back-up, but otherwise I use bleach. I also use cal-hypo shock to bring up my calcium, which I keep at about 125 in my fiberglass pool.
    Northeast PA
    16'x32' kidney 16K gal IG fiberglass pool; Bleach; Hayward 200lb sand filter; Hayward pump; 24hrs; Pf200; well; summer: none; winter: mesh; ; PF:7.5

  7. #7
    Join Date
    Mar 2006
    Posts
    16

    Default Re: New IG vinyl liner - initial results

    In fact, I'm heading out this weekend, so I've dropped a couple of pucks into the feeder to keep things going while I'm away. Hopefully, things will not have gotten too far out of hand by the time I get back.

    This morning:

    ph - 7.5 (started at 7.2, but trying to maintain 7.5)
    alk - 80 (trying to adjust to about 100)
    fc - 6 ppm
    cc - 0
    tc - 0
    cya - 0 (but trying to adjust to 25-30)
    h20 temp - 70 degrees (pool is 3/4 in the shade)


    Happy Memorial Day weekend!

+ Reply to Thread

Similar Threads

  1. initial results after pool refill, lots of stuff to add, what order and how much?
    By vinouspleasure in forum Testing and Adjusting Pool Water Chemistry
    Replies: 4
    Last Post: 07-25-2011, 11:03 PM
  2. Initial test results...green ring, combined chlorine...HELP!!!
    By Sheri in forum Testing and Adjusting Pool Water Chemistry
    Replies: 7
    Last Post: 07-16-2010, 11:51 AM
  3. Getting a New Vinyl Liner
    By Spensar in forum In-Ground Pool Construction and Repair
    Replies: 1
    Last Post: 06-18-2007, 09:36 AM
  4. SWG for Vinyl Liner
    By markeast in forum Salt Generators (SWCG) & other Chlorine Feeders
    Replies: 4
    Last Post: 07-11-2006, 02:50 PM
  5. initial test results
    By p.p.h. in forum Testing and Adjusting Pool Water Chemistry
    Replies: 3
    Last Post: 04-11-2006, 12:12 PM

Bookmarks

Posting Permissions

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