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Thread: Pucks and Jugs

  1. Back To Top    #1

    Join Date
    May 2010
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    New Engalnd
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    114

    Pucks and Jugs

    Hello,

    You guys helped me last year so I figured I would pick your brain again.

    2 years ago I bought a mother load of 3 inch pucks. Last year, I began using the bleach method. The problem now is that I have a huge tub of pucks sitting in the pool shed. As you guys know, these are expensive. I'm aware that the pucks can/will raise CYA levels. My CYA is currently at about 45 (after dumping some stabilizer in a week ago).

    My question is this: If I use a puck every couple days in the pool, will I significantly raise my CYA level? to the point where I will need way too much bleach to shock the pool? I'm trying to understand how much CYA each puck will really increase my pool by.
    Matt

    Hayward Pump 3/4 HP - brand new
    sta rite sand filter - not sure of size, i will get back to this
    20 by 40 inground pool, vinyl liner, 8ft deep end
    2 skimmers and a main drain.
    1 jet in the deep end, 1 jet in the shallow end.
    Live in New England = about 3 months of pool usage.

  2. Back To Top    #2
    Puffin's Avatar
    Join Date
    Jul 2010
    Location
    Metro Atlanta, Georgia
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    217

    Re: Pucks and Jugs

    You should be able to use the pool calc to figure out how many PPM one puck will raise your CYA

    At the bottom, put in the weight of the puck (I think they're 8oz) then select trichor.
    19,600 gal, Vinyl, Grecian L, StaRite Dura-Glas 1 HP pump, 3/4hp booster, Pentair Clean and Clear 420 Cartridge filter
    The Pool Cleaner 4x, PoolSkim

  3. Back To Top    #3

    Join Date
    May 2010
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    New Engalnd
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    114

    Re: Pucks and Jugs

    Ok. So using that calculation it says it will raise it by 1. With that said, my pool is open for about 3-3.5 months. So this is about 15 weeks. Assuming about 2 pucks per week, I'd raise my CYA by 30 for the season. Bringing my total to about 75 for the CYA.

    This is not in danger, but it is on the high side. I also wonder what the impact of backwashing has to this. I do backwash when when the PSI gets gets about 5-10 higher than normal.

    Thoughts on this ? Recommendations?
    Matt

    Hayward Pump 3/4 HP - brand new
    sta rite sand filter - not sure of size, i will get back to this
    20 by 40 inground pool, vinyl liner, 8ft deep end
    2 skimmers and a main drain.
    1 jet in the deep end, 1 jet in the shallow end.
    Live in New England = about 3 months of pool usage.

  4. Back To Top    #4

    Re: Pucks and Jugs

    Are your pucks Dichlor or Trichlor? That will make a difference of how much CYA your puck is adding to your water. There is a thread on here that explains in great detail. To sum it up, it does not add a significant amount, but over time it does build up.
    17,000 gallon IG Humpback Kidney
    333k Sta-Rite Max-e-therm Heater
    Sta-Rite Modular Filter
    Intellichlor IC-40
    Awesome Tiki Bar!!!!!

  5. Back To Top    #5

    Re: Pucks and Jugs

    When you backwash you are dumping water and you need to refill that amount with tap water which has no CYA. So backwashing is helping to keep CYA lower.

    Probably best to keep a log of your CYA levels, then estimate when it will have risen by some amount large enough to see on a test. Given the test is good to +/-10 or 15, when you have used 15 pucks, or maybe 20, retest CYA to see where you really are.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

  6. Back To Top    #6

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
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    12,082

    Re: Pucks and Jugs

    Quote Originally Posted by 2001rotax800
    Are your pucks Dichlor or Trichlor?
    There are no [EDIT] slow-dissolving [END-EDIT] Dichlor pucks. Only Trichlor and sometimes Cal-Hypo.

    For every 10 ppm FC added by Trichlor, it also increases CYA by 6 ppm. So with a fairly typical 2 ppm FC per day chlorine usage, using only Trichlor pucks would increase CYA by over 35 ppm per month.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  7. Back To Top    #7

    Re: Pucks and Jugs

    all this being said, i have to wonder why you added cya when you had pucks to use up. i always
    keep my cya on the low side (30 or so), just so i can use pucks when i'm away on vacation. over the
    course of the summer my cya will usually rise to 45 or 50 and i can use up the pucks i have.
    24,000 gallon ig fiberglass pool
    1 hp hayward pump
    hayward sand filter (250 lb)
    madisonville, ky

  8. Back To Top    #8

    Join Date
    May 2010
    Location
    New Engalnd
    Posts
    114

    Re: Pucks and Jugs

    yeah..well I'll stop using them. I guess it was a dummy move on my part.
    Matt

    Hayward Pump 3/4 HP - brand new
    sta rite sand filter - not sure of size, i will get back to this
    20 by 40 inground pool, vinyl liner, 8ft deep end
    2 skimmers and a main drain.
    1 jet in the deep end, 1 jet in the shallow end.
    Live in New England = about 3 months of pool usage.

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