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

Thread: Powdered Shock

  1. Back To Top    #1

    Join Date
    May 2014
    Location
    Clarksburg, WV
    Posts
    331

    Powdered Shock

    Is there a way to tell how much a bag of powdered shock will raise the FC and CYA in a pool?

    I'm thinking i could use the bag of shock to raise FC and CYA up and not have to buy stabilizer. Just curious how much it will raise CYA. I'm not really concerned about the FC part. I just dont want to overshoot on the CYA number.
    24'x54" 15k AG round - Outback Genesis
    1 1/2hp Hayward Matrix 2 speed. Hayward 180T Sand Filter
    TF-100 Test Kit
    Pool School & TF-100
    How to SLAM

  2. Back To Top    #2
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: Powdered Shock

    Certainly! Use Pool Math and the section at the bottom of the page that says Effects of adding chemicals​. Make sure you have your pool volume in the table above.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  3. Back To Top    #3

    Join Date
    May 2014
    Location
    Clarksburg, WV
    Posts
    331

    Re: Powdered Shock

    I did. But I think I just answered my own question.

    53% Cal Hypo is on the label of the HTH powdered shock I have. Pool math says it wont add any CYA. Just FC and CH and of course salt.

    I thought all tabs/shock had CYA in them? Maybe i've been confused all along.
    24'x54" 15k AG round - Outback Genesis
    1 1/2hp Hayward Matrix 2 speed. Hayward 180T Sand Filter
    TF-100 Test Kit
    Pool School & TF-100
    How to SLAM

  4. Back To Top    #4
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: Powdered Shock

    Not all shock/tabs have CYA. Depends on the actual chemical formula.

    Trichlor is chlorine and CYA, but less CYA than dichlor per chlorine/FC. Cal-hypo is Calcium Hypochlorite so calcium and FC. Bleach is well... just hypochlorite and sodium.

    Powdered chlorine products:
    Trichlor: FC + CYA, usually tablet form
    Dichlor: FC + CYA, usually powder form
    Cal-Hypo: FC + CH, tabs or powder
    Lithium Hypochlorite: FC + Li, powder
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

Posting Permissions

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