Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 7 of 7

Thread: Water slightly cloudy, plan to shock; but how high to go?

  1. Back To Top    #1
    renohuskerdu's Avatar
    Join Date
    Aug 2010
    Location
    Alsace, France
    Posts
    44

    Water slightly cloudy, plan to shock; but how high to go?

    Hi all,

    Thanks to you fine people, we are BBB users now - started this year. I buy little plastic bubbles of 9.6% sodium hypoclorite at the supermarket for 40 cents, and we use only one a day in season. When I went to buy more test strips, the pool store people said they thought we had moved away. That is a Good Thing, n'est pas?

    I love my wife but she is very french, so most all things must be pretty and artistic, if you catch my drift. Recently Griselle noticed that the water is not quite clear. She's right of course, it is mostly clear but not crystal. It's just not clear enough to be able to point to proudly as evidence of doing an excellent BBB job. We have neighbors spending thousands yearly on pool stores, to whom I would love to show our BBB pool that costs us only $50 per year.

    Our sand filter is of generous size but has no pressure meter, so I'm reluctant to add DE. That is something I will fix but not right away (competing projects include needed roofing). Our brominator is still plumbed in but has been empty of pucks all year.

    Our ability to vaccuum could best be described as 'crippled' in that our kids' attempts to do so invariably lead to the pump losing its prime, setting off an escalation which brings me off a ladder or out from under a car. So floculant use is problematic, which is a shame as that might clear up that water too. If I could add DE, I ponder that the filter would work nicely with modest floculant quantities...maybe next summer.

    Numbers:
    Clorine from 0-4 ppm depending on when I add the bleach. 2 is my goal.
    Ph ranges from 6.5 to 7.5, hardly ever needs modification.
    TA around 100 and rarely need adjustment.

    Some of you may remember me as the poor cluck who could not find a good test kit in France. I am still that poor unfortunate and make do with an AquaChek (insert boo and hiss sounds here).

    No shocking has been done for a month because I was away in sunny California. Now I'd like to do a proper job of shocking the pool. I read pool-school/shocking_your_pool which is great theory, but I missed the info on exactly how high I should go in ppm when shocking.

    So once again I turn to this body of like-minded poolheads for pertinent answers:
    . How many ppm of free CL should I reach in order to properly shock my pool?
    . How long should that ppm level be maintained?


    FYI, I also just read these threads:
    pool-school/bbb_for_pools
    i-still-have-a-cloudy-pool-t47209.html
    pool-school/add_de_to_a_sand_filter

    Thanks from Alsace, France, where my wife is pretty and does not smoke.

    Reno
    Pool-store refugee, Alsace France. AG 5k gal, sand filter, Brominator, pump 15 gpm (3.5 m3 / hour).
    Thanks to you guys we are switching to bleach from the supermarché!

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Water slightly cloudy, plan to shock; but how high to go

    In order to know what your shock level is, you have to know what your CYA level is.

    If you have no CYA then your shock level is 10 ppm and you need to keep it there until you pass the OCLT and the water is clear. However, without a FAS-DPD test you can't run the OCLT so you'll have to go by the clarity of the water. That's far from ideal but given your circumstances, it'll have to do.
    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
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Water slightly cloudy, plan to shock; but how high to go

    As long as you're in the States, buy a test kit!
    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!

  4. Back To Top    #4
    renohuskerdu's Avatar
    Join Date
    Aug 2010
    Location
    Alsace, France
    Posts
    44

    Re: Water slightly cloudy, plan to shock; but how high to go

    Quote Originally Posted by Richard320
    As long as you're in the States, buy a test kit!
    Aaaaargh! Why didn't I think of that? Grrrr. But then, would the airline have allowed it in checked luggage? When I tried to buy, the seller told me that USPS will no longer mail the kits internationally. TSA might have had kittens over it as well (a colourful brit expression).

    Quote Originally Posted by Bama Rambler
    In order to know what your shock level is, you have to know what your CYA level is.
    [...].
    It should be zero, as I have never used CL pucks. Before finding this forum, I did use shock clorine from the pool store, which might(?) include CYA. Just to be safe, I could buy a kit to test for it. Do you recommend that I go that route?

    Thanks!
    Pool-store refugee, Alsace France. AG 5k gal, sand filter, Brominator, pump 15 gpm (3.5 m3 / hour).
    Thanks to you guys we are switching to bleach from the supermarché!

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

    Re: Water slightly cloudy, plan to shock; but how high to go

    Quote Originally Posted by renohuskerdu
    Quote Originally Posted by Richard320
    As long as you're in the States, buy a test kit!
    Aaaaargh! Why didn't I think of that? Grrrr. But then, would the airline have allowed it in checked luggage? When I tried to buy, the seller told me that USPS will no longer mail the kits internationally. TSA might have had kittens over it as well (a colourful brit expression).

    Quote Originally Posted by Bama Rambler
    In order to know what your shock level is, you have to know what your CYA level is.
    [...].
    It should be zero, as I have never used CL pucks. Before finding this forum, I did use shock clorine from the pool store, which might(?) include CYA. Just to be safe, I could buy a kit to test for it. Do you recommend that I go that route?

    Thanks!
    You won't know if you don't try!

    People fly all kinds of stuff. I hauled 6 bottles of wine and two large rolls of freezer paper (Used for some sort of craft project and apparently hard to find cheap in UK) to England last May. I hauled a case of beer back.
    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
    UnderWaterVanya's Avatar
    Join Date
    Jun 2012
    Location
    Mint Hill, NC
    Posts
    2,589

    Re: Water slightly cloudy, plan to shock; but how high to go

    Checked luggage allows for liquids and probably would not be an issue - none of these liquids is explosive flamable etc.

    Carry on - NO.
    Inlaws Pool Boy since June 14th 2012, Pool built ~ 2003, In-Ground, 16'x32'
    13500 gal, Vinyl Liner, Fiberglass Slide, TF-100 Test Kit, Hayward 210T
    sand filter, A.O. Smith 1.5HP main pump motor (C48L2N134C1),
    Hayward SuperPump (model ?), Polaris 380 & PB4 Booster Pump

  7. Back To Top    #7
    renohuskerdu's Avatar
    Join Date
    Aug 2010
    Location
    Alsace, France
    Posts
    44

    Re: Water slightly cloudy, plan to shock; but how high to go

    Just a quick note to confirm two things that I believe to be true about measuring FC based on this old thread converting-from-bromine-to-chlorine-pucks-any-advice-t37885.html:

    1. Because my pool was first a bromine pool, with bromine pucks used for two years, I must continue to ~double the FC measurements even though I'm BBB now. If I see, say, 3.9 on the meter, that's really about 8.0 in fact.

    2. Once I change the water and startup BBB, then I will measure FC normally and happily forever and ever.
    Pool-store refugee, Alsace France. AG 5k gal, sand filter, Brominator, pump 15 gpm (3.5 m3 / hour).
    Thanks to you guys we are switching to bleach from the supermarché!

Posting Permissions

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