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Thread: Do I need to shock after drain and refill?

  1. Back To Top    #1

    Join Date
    Mar 2008

    Do I need to shock after drain and refill?

    I am helping a buddy.His CYA was over 300 from years of tablet usage.We drained and filles his pool last night.My question is do I need to shock the water to start.Here are the current number of a 8000 gallon pebble tec pool.Also in what order to I bring everything up in?Thank You in Advance oh Great Pool Website

    FC .5
    CC 0
    Ph 7.3
    TA 20
    CH 20
    CYA 0

    I will be using liquid cya just an fyi
    10,500 gal Gunite,Imperial White River Rok,1.5hp Pentair Whisperflo,320sqft Clean & Clear,Intellichlor 40 SWG,EasyTouch w/Remote,Pentair Pool Shark Sweep(suction side),Jandy AE2000 Heat Pump & 8mil Solar Blanket,SAM Light,18in Caribean Shelf,6 & 4 ft Benches

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    reebok's Avatar
    Join Date
    Apr 2009
    Lakeland, FL

    Re: Do I need to shock after drain and refill?

    not counting cya, TA, CH and FC all need to be increased soon. see here for recommendations:
    16x32 21,000 gallon in-ground exposed aggregate, 1.5hp pump, 120 sqft catridge filter, birdcage, solar panels, aquavac tigershark qc robot.

  3. Back To Top    #3

    In the Industry

    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: Do I need to shock after drain and refill?

    No, you don't need to shock.

    You don't need liquid CYA either, why the added expense? I'd just go with granular.

    Adjust the TA with Baking Soda up to 70, ASAP, so the PH level is stable.

    I agree, pick up some Calcium Increaser.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    Perfectly Clear Pool Service, Find me on Facebook!

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