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Thread: SLAMming my Pool

  1. Back To Top    #1

    Join Date
    Jul 2008
    Location
    Seacoast, NH
    Posts
    248

    SLAMming my Pool

    I'm Slamming my pool because of increased chlorine demand and the water was looking a little dull. Yesterday I put in enough liquid chlorine to bring FC to 20. I started feeling unwell because of a tooth extraction, so I couldn't do anything more yesterday.

    Tested this morning and the FC was 13.5 and CC was <0.5. I don't know if it dropped from 20 because the chlorine was used up or if it really never got that high bc my liquid chlorine was about a month old and maybe degraded
    I bought some fresh chlorine and brought the FC up to 21.5. As soon as I poured it in, the water got very cloudy. Dead algae is now on the bottom of the pool.

    My SWG is off.

    The FC is not dropping. My readings today are:

    2:00 21.5
    3:00 21
    5:00 21
    8:00 21

    I'm surprised that the FC isn't budging. Could it be as simple as that the algae is all dead already?

    Measurements from yesterday, before Slamming:

    FC 5
    CC 0
    pH 7.6
    CH 200
    TA 80
    CYA 50
    19,000 gallons, Well Water
    Stay-Rite System 3 Cartridge filter
    IG vinyl, MasterTemp 400 Propane heater
    Intellichlor 40 SWG, 2006 Taylor Test Kit with Speed Stirrer
    1.5 HP Pump

  2. Back To Top    #2

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: SLAMming my Pool

    Hmmm. Do you know how to do an OCLT?

  3. Back To Top    #3
    Piolin's Avatar
    Join Date
    Sep 2010
    Location
    Miami, FL
    Posts
    604

    Re: SLAMming my Pool

    Did you brush your pool?, I think it as soon as you brush your FC will be consumed faster

    Also, did you lowered your pH to 7.2 before slamming? FC is more effective at this level
    8,400 gal Intex, 3K GPH pump, 16" sand filter, SWG CG-28669, TF100 test kit, speed stir, K-1766 Taylor salt test.

    The corner stone of TFP
    Pool School - Chlorine / CYA Chart

  4. Back To Top    #4

    Join Date
    Jul 2008
    Location
    Seacoast, NH
    Posts
    248

    Re: SLAMming my Pool

    I know how to do an OCLT and will do one tonight. Just perplexed about the lack of movement in FC.

    I forgot to lower the pH before I started. I always forget that.

    I will go do some brushing when Harry Potter is over.
    19,000 gallons, Well Water
    Stay-Rite System 3 Cartridge filter
    IG vinyl, MasterTemp 400 Propane heater
    Intellichlor 40 SWG, 2006 Taylor Test Kit with Speed Stirrer
    1.5 HP Pump

  5. Back To Top    #5

    Join Date
    Aug 2014
    Location
    Northern IL
    Posts
    4,615

    Re: SLAMming my Pool

    Ha! Enjoy the movie. Your pH is fine. I don't like to hear that "you always forget that". We don't want you to be slamming often!

    Remember to turn off the SWG and take your final nighttime FC reading at LEAST a half hour after your last chlorine addition for the OCLT. Those are two huge problems people encounter with the OCLT.

  6. Back To Top    #6

    Join Date
    Jul 2008
    Location
    Seacoast, NH
    Posts
    248

    Re: SLAMming my Pool

    Brushed for about 30 mins, took a sample, and FC was 20.5, CC was <0.5. We'll see where it is in the morning
    19,000 gallons, Well Water
    Stay-Rite System 3 Cartridge filter
    IG vinyl, MasterTemp 400 Propane heater
    Intellichlor 40 SWG, 2006 Taylor Test Kit with Speed Stirrer
    1.5 HP Pump

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