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Thread: Question about test results and green pool

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    Question about test results and green pool

    I have been running like crazy the last few days and ran out of chlorine. The water turned green on me but I got to it quickly. The problem is I just threw bleach at it till I could test the water. I put 5 gallons the first night and 2.5 the next morning. The next night I threw another container in (2.5 gallons).
    Today is the next afternoon so the chlorine has been in the sun for 2 days. This afternoon I cleaned the filter out real good and reloaded the autoclorinator (it was empty). Then I tested the water
    Here are the numbers
    TA 130
    PH 8.2 (we have had a lot of rain)
    CYA 32
    FC 2.5
    CC 0

    My question is since all of the chlorine is free after 2 days do you think that means the algae is dead? I couldn't get readings in the morning after adding the chlorine. The water is pretty clear with just a hint of cloudy from dead algae. I was hoping not to have to take it back to 15 and measure in the morning. I only have 2 jugs left. I guess I can run to the tore and get some of those powder shock packets if you guys think I should.

    What do you think?
    I really apreciate all the help I get here. Our local pool stores were killing me before I found this site.
    37000 gallon inground vinyl
    intelliflo 11018
    Pentair 80 sand filter
    3/4 booster with polaris 260

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    JasonLion's Avatar
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    May 2007
    Location
    Silver Spring, MD
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    37,887

    Re: Question about test results and green pool

    First, you need to get the PH down. You don't want the PH to be above 7.8.

    Still having a FC level after 24 hours does tend to suggest that you have killed all the algae, though it doesn't prove it. It is possible for small patches of algae to survive medium chlorine levels and then grow back a couple of days later, though that isn't exactly common.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    frustratedpoolmom's Avatar
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    May 2007
    Location
    SWSuburban Chicago, IL
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    11,963

    Re: Question about test results and green pool

    Quote Originally Posted by sjoefl01
    I guess I can run to the tore and get some of those powder shock packets if you guys think I should.
    You would be much better off runing to the store and getting some more bleach... and like Jason said, some Muratic Acid to lower your PH.

    Be weary of those powder shocks; the contain extra things that you don't necessarily want to add...
    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
    http://www.PerfectlyClearPoolService.com

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