Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: Stupid Question Alert: Liquid "Shock"

  1. Back To Top    #1

    Join Date
    May 2007
    Location
    Milwaukee, WI
    Posts
    44

    Stupid Question Alert: Liquid "Shock"

    Hi Everyone:

    I'm sure this is a completely stupid question, but, who else can I ask? We still have gallons of "Poly-Guard Ultra Shock" leftover from when we first opened our pool last month. (Before we found out about BBB.) The ingredient list says:

    Active Ingredient
    Available Chlorine: 15%
    Sodium Hypochlorite: 12.5%
    Inert Ingredients: 87.5%

    Sooo, is this stabilized or unstabilized chlorine? We don't want to use this stuff if it's going to add any more stabilizer to our pool. CYA isn't mentioned anywhere on the label, but we're not sure if it's part of that vague "inert ingredients" description. Thanks for your help!
    22,000 Gallon, IG, Vinyl, Sta-Rite Sand Filter
    Milwaukee, WI area

  2. Back To Top    #2
    KurtV's Avatar
    Join Date
    Mar 2007
    Location
    SE Louisiana
    Posts
    270
    That's just super strength bleach. You can use it as you would any other bleach; just remember it's twice (or more) the strength of "ultra".

  3. Back To Top    #3

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,085
    The "Inert Ingredients" is just water and salt (i.e. salt water). The salt is a byproduct of the manufacturing process when chlorine is put into lye. Salt is also found in Cal-Hypo and Lithium Hypochlorite.

    Note that the 15% concentration (probably Trade %) is rather high and will degrade somewhat quickly unless you store this chlorine in cool conditions. See the chart at the bottom of this link where you can see that 15% chlorine will lose half of its potency in 2 months at 85F, 3 months at 80F, etc. A concentration of 12.5% Trade (% available chlorine by volume) or sometimes 10% is more typical. Most bleach is 5.7% (trade) for comparison (this is marked 6% sodium hypochlorite by weight on the bottle).
    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"

  4. Back To Top    #4

    Join Date
    May 2007
    Location
    Milwaukee, WI
    Posts
    44
    Thanks so much for the information. I'm glad to know that the chlorine won't go to waste!
    22,000 Gallon, IG, Vinyl, Sta-Rite Sand Filter
    Milwaukee, WI area

Posting Permissions

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