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Thread: Want to make sure I'm headed in the right direction

  1. Back To Top    #1

    Join Date
    Jun 2016
    Location
    Lakeland, FL
    Posts
    30

    Want to make sure I'm headed in the right direction

    Been battling getting my pool back to normal levels. Neglect from when I moved in threw things in wack.

    Did a recent test today after draining and refilling last week.

    FC: 17
    CC: 1
    TC: 18
    CYA: 110 (Used dilution method)
    TA: 100
    PH: 8
    CH: 330


    Pool Calculator says need to do a variety of things. First and foremost drain and refill 27%.

    I am draining at 1 gal every 3 seconds so if my math is right it'll take me roughly 4 hours to drain the 4800 gals. Sound about right?

    My process is going to be as follows. Please correct if I am wrong:

    1. Drain 4800 gallons
    2. Refill
    3. Check Chem levels
    4. Add Salt (lost in the drainings I've done)
    5. Adjust TA and PH as needed AFTER CYA and FC levels are set.
    FL Resident
    IG 18,000 gal plaster
    Hayward Swim Clear Cartridge Filter
    Hayward Swimpure Extreme swcg
    A.O. 1HP motor

  2. Back To Top    #2
    mikemass's Avatar
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    Jul 2013
    Location
    Northern Howell, NJ
    Posts
    484

    Re: Want to make sure I'm headed in the right direction

    You are correct that the only way to lower your CYA is by doing a partial drain. The most important thing you should concern yourself with after refill is keeping the pool properly sanitized i.e. your FC level. After that in order of importance, the CYA and pH, and finally tweaking the CH and TA.
    25 + year pool owner. Current pool (going on 11th year) - 38K gallon in ground Gunite/White Plaster, Spillover Spa, Hayward Cartridge Filter, Hayward 450k BTU NG Heater, Hayward Goldline Aqua Logic control with T-Cell-15 Salt Water Cell, Dolphin Explorer.
    You Need: Bleach, a A Test Kit & a Bookmark to "Pool School". Now what's your question?

  3. Back To Top    #3
    Mod Squad JVTrain's Avatar
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    Feb 2014
    Location
    Central Minnesota
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    5,079

    Re: Want to make sure I'm headed in the right direction

    What does your water look like? You're probably looking at a SLAM to clear the water if it's green with limited visibility. If you could post a picture that would be great.

    Looks like you're targeting 80 ppm from your 110 ppm CYA based on your 27% drain. If the water is cloudy, green and far gone, I would recommend draining more. It's easier to SLAM a pool with lower CYA and you can bump it back up after the SLAM for likely less cost than the extra bleach you'll need. I'd go for closer to a 40% drain and refill.

    What you do after that depends on the condition of the water, but if there is any cloudiness or evidence of algae, it's a SLAM situation.
    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

  4. Back To Top    #4

    Join Date
    Jun 2016
    Location
    Lakeland, FL
    Posts
    30

    Re: Want to make sure I'm headed in the right direction

    Hi. No cloudiness and or discoloration. The pool is completely clear. I've been battling high CYA levels since I got this pool. The CYA was off the charts and so was the FC. I drained some last week and retested like I said above, but it only brought the CYA down to 110. I just want to get back to normal levels.

    Other than that I'm not really having any issues (except for low salt from the fresh water, but I bought about 5 bags today. May need more.) I'm still getting used to the SWG I had installed. I have yet to do a OCLT, I'll do that when I'm back to a normal CYA level.
    FL Resident
    IG 18,000 gal plaster
    Hayward Swim Clear Cartridge Filter
    Hayward Swimpure Extreme swcg
    A.O. 1HP motor

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