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Thread: Quick question on clearing up pool

  1. Back To Top    #1

    Quick question on clearing up pool

    Guys,
    I had an algae bloom a few weeks ago that I couldn't battle. I knew at the beginning of the season my CYA was high, but thought I could get through the summer. I use 3" trichlor tablets and CYA rose a bit higher. So did a huge water change, followed the shock instructions here and now have things under control again.

    My question is that the algae is gone, but the water is not quite clear yet. I suspect due to high TA levels (See readings below). Any advice on how to lower TA quickly. I've been slowly lowering the PH and following the information in pool school. But will take a long time at this rate. Any advice is appreciated.

    I've got an 18x32 above ground pool, vinyl liner, 300 lb sand filter.
    PH - 7.2 (lowering)
    CL - 10 ppm (Been keeping it slighty on the high side to insure algae is gone
    CYA - 40 ppm (after 60% water change)
    TA - 240 PPM (I have well water, and anything else is too expensive to truck in)
    CH - 50 ppm (I know his is low, but wasn't concerned since vinyl liner)

    Water is just slightly cloudy at this point.
    18 x 32 Oval - Above Ground - Vinyl
    300 lb sand filter
    1.5 hp motor/pump

  2. Back To Top    #2

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: Quick question on clearing up pool

    When did you stop the shock process? Did you go through the whole process? One of the criteria for shocking your pool is to continue until the water is clear. Do you have a picture of your water?

    Here's the article on how to lower TA, in Pool School, I assume this is the one you are using?
    pool-school/lowering%20total%20alkalinity
    Unfortunately, there isn't a faster way.
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

  3. Back To Top    #3

    Join Date
    Oct 2010
    Location
    Georgia
    Posts
    317

    Re: Quick question on clearing up pool

    Continue to lower the TA as per pool school directions. This is the safest way
    Bump the FC up to 16 for 2 more days.
    pool-school/chlorine_cya_chart_shock

    At the same time, you can add a little DE to the sand filter.
    Keep that pump/filter running 24/7.
    You will soon be able to see the difference
    Please report back in a couple of days.

    pool-school/add_de_to_a_sand_filter

    PSG
    poolschoolgrad

    20x40 free-form IG vinyl, 1hp Hayward superpump, Hayward pro grid DE filter, Raypak heatpump, Goldline Aquarite SWCG, Polaris 280 with booster, and tested using a Taylor K2006.

  4. Back To Top    #4

    Join Date
    Jun 2010
    Location
    Glendale, CA
    Posts
    513

    Re: Quick question on clearing up pool

    The cloudy is probably just dead algae the sand filter is being slow to clear. Very common experience with a sand filter.

    For it to be PH/TA/CH related you would expect a much higher CH level.
    16K Gal Plaster | Compupool SWG | Intelliflow VF | TF-100

  5. Back To Top    #5

    Re: Quick question on clearing up pool

    If you passed the overnight test, then it is the filter, I'll guess.
    23,000 gallon in ground pool with rock waterfall and spillover spa, Aqualink control system, Polaris 380 cleaner, Purex Triton Clean&Clear Plus cartridge filter. Located in The Woodlands, Texas.

    Pool owner since Nov 2008, Trouble Free since April 2009. Happy to help when I can.

  6. Back To Top    #6

    Re: Quick question on clearing up pool

    Quote Originally Posted by Poolschoolgrad
    Continue to lower the TA as per pool school directions. This is the safest way
    Bump the FC up to 16 for 2 more days.
    pool-school/chlorine_cya_chart_shock

    At the same time, you can add a little DE to the sand filter.
    Keep that pump/filter running 24/7.
    You will soon be able to see the difference
    Please report back in a couple of days.
    Just wanted to say thanks to Poolschoolgrad. I bumped up the chlorine and and started using some DE in the sand filter. After a few more days the water is clear again. TA is still high and will keep working to bring it down. Sun is hot, water is clear, life is good.

    Thanks all.
    18 x 32 Oval - Above Ground - Vinyl
    300 lb sand filter
    1.5 hp motor/pump

  7. Back To Top    #7

    Join Date
    Aug 2010
    Location
    Dallas, TX
    Posts
    4,052

    Re: Quick question on clearing up pool

    Yep, it just takes a while to get it all clear with a sand filter. Good job! Go enjoy your pool!
    Built in 1957 44,000 gallon in-ground, Wet Edge Primera Stone in Sky Blue, Intelliflo VF Pump, 600 lb. Pentair Triton II TR-100 Sand Filter, CircuPool RG 60 Plus SWG, TF-100 test kit
    If TFP has helped you, please click to SUPPORT TFP!

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