Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: After Partial Drain - Time to Get Balanced, Need Help

  1. Back To Top    #1

    Join Date
    Apr 2016
    Location
    Waterloo/ Ontario Canada
    Posts
    32

    After Partial Drain - Time to Get Balanced, Need Help

    So I just completed a partial drain and refill because of a very high CYA level. I drained about 45% of the pool. I want to make sure I will get things right this time to avoid getting a high stabilizer level again as it's a real pain to get it back down.

    So the pool is still blue, it has been off for a few days now, but I don't see any green algae or anything out of the ordinary, so should I shock the pool first before I start chlorinating again or should I test first after the refill and see if my combined chlorine is over 0.5? My pool store said I should shock every week but I think I don't need to shock unless my CC level gets over 0.5 right?

    I want to be cautious with the stabilized Chlorine pucks to not raise my CYA levels too high again, so I am planning on very slowly bringing my chlorinator up every day until I reach the right chlorine level ratio that's relative with the CYA level that I get after the shock. So I'm thinking maybe it's a good idea to shock to keep things sanitized while I bring up the chlorinator? Does this sound like the way to be moving forward from my situation? The Chlorine pucks that I'm using are stabilized "Club Pro - King Size Pucks" 100% Trichloro-s-triazinetrione (Available Chlorine Content = 90%).

    My Levels before the partial drain were as follows:

    FC = 3
    CC = 0.5
    TC = 3.5
    PH = 7.6
    TA = 175
    CH = 175
    CYA = 146

    Thanks for any help!
    65,000 liter / 17,171 gallon pool with vinyl liner. STA-Rite Sand Filter Model T-200BP-1. STA-Rite 1hp Pump Model MPRA6E-147L. Laars Lite 2 Heater with Jandy Control Panel. Hayward Chlorinator Model CL220. Intermatic Timer.

  2. Back To Top    #2

    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Location
    Greenville, SC
    Posts
    1,798

    Re: After Partial Drain - Time to Get Balanced, Need Help

    How did you test a CYA of 146?

    You should not use those pucks at all. Even if we believe that 146, you are still looking at CYA ~75 which is super high. Each puck will just bring it up more.

    Lastly you should stay out of the pool store.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  3. Back To Top    #3

    Join Date
    Apr 2016
    Location
    Waterloo/ Ontario Canada
    Posts
    32

    Re: After Partial Drain - Time to Get Balanced, Need Help

    I used a k-2006 to test the CYA and the pool store test confirmed it.

    So what should I use instead of the pucks? I just bought a huge tub of them...
    65,000 liter / 17,171 gallon pool with vinyl liner. STA-Rite Sand Filter Model T-200BP-1. STA-Rite 1hp Pump Model MPRA6E-147L. Laars Lite 2 Heater with Jandy Control Panel. Hayward Chlorinator Model CL220. Intermatic Timer.

  4. Back To Top    #4

    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Location
    Greenville, SC
    Posts
    1,798

    Re: After Partial Drain - Time to Get Balanced, Need Help

    Pool store testing is notoriously inaccurate, especially CYA.

    Here's a good article Pool School - Recommended Pool Chemicals
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  5. Back To Top    #5

    Join Date
    Apr 2016
    Location
    Waterloo/ Ontario Canada
    Posts
    32

    Re: After Partial Drain - Time to Get Balanced, Need Help

    Ok, thanks! I have been looking into liquid chlorine/bleach and will be giving that a try and will keep my chlorine pucks for the future if I ever need a bump in my CYA.

    I'm still confused on whether or not I should shock once my refill is done. I bought a tub of shock that has 65% Calcium Hypochlorite, but I'm not sure if it will add stabilizer which I don't want to do.
    65,000 liter / 17,171 gallon pool with vinyl liner. STA-Rite Sand Filter Model T-200BP-1. STA-Rite 1hp Pump Model MPRA6E-147L. Laars Lite 2 Heater with Jandy Control Panel. Hayward Chlorinator Model CL220. Intermatic Timer.

Posting Permissions

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