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Thread: Foam when adding chlorine

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    Foam when adding chlorine

    I am getting a very fine foam forming about a minute after I add either liquid or powered chlorine. The foam disapates after about an hour. Water is clear and there are no visible organics on the bottom.

    Test kit readings are as follows:
    FC 8
    CC 2
    TC 10
    pH 7.2
    TA 260
    CH 250
    CYA 40

    May not be an issue but pool store said it was due to some imbalance and every time they prescribe something different. Now that I have switched to TFPC i hope to eliminate the 'over - prescribing'

    Any ideas on the cause of the foaming and is this typical?

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    Texas Splash's Avatar
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    Re: Foam when adding chlorine

    Hello and welcome to TFP! Foaming is not rare, but not typical either. If these readings are from your own test kit (TF-100 or Taylor K-2006), Then I'd say something is in the water causing that increased CC reading of 2. I'm assuming some pool store snake oils were added in the past huh? It could be the bleach is reacting to that stuff. Your liquid chlorine hopefully is just plan regular bleach from the grocery store or the pool store liquid shock (same thing) right. Plain Sodium Hypochlorite. No scented or splashless stuff? With that CC reading, I would encourage you to SLAM (link below), raising your FC to 16 until you pass all 3 SLAM criteria. If you're not convinced a SLAM is in the cards yet, at least do an overnight (OCLT) test to confirm FC loss over 1 ppm.
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
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  3. Back To Top    #3

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    Re: Foam when adding chlorine

    Yes readings were from TF-100 - new kit just received!

    OCLT test planned for tonight.

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    Richard320's Avatar
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    Re: Foam when adding chlorine

    My guess is one of the many wallet-draining snake oils the pool store sold you is reacting with the chlorine. Cheap algaecides will foam, for sure.

    The other option is that you bought splashless bleach, which is pretty much like adding Mister Bubble to the pool.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Foam when adding chlorine

    We have been using liquid 12.5% NaOCl pool shock and Clorox Brand Shock Plus (sodium dichlor 58.2%). For the OCLT, should the pump by on or off overnight?

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    Richard320's Avatar
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    Re: Foam when adding chlorine

    Quote Originally Posted by Waterboy1850 View Post
    We have been using liquid 12.5% NaOCl pool shock and Clorox Brand Shock Plus (sodium dichlor 58.2%). For the OCLT, should the pump by on or off overnight?
    Generally on. The OCLT is usually the tail end of a SLAM, and that has the pump on all night. Do you really want to get up an hour earlier to start the pump so it has an hour to mix well, all before the sun comes up?
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Foam when adding chlorine

    Good point, need to sleep in a bit tomorrow!

    Also, here's a little of the cash we have deposited in the quest for clarity over the past 4 weeks:
    - 75 gals shock
    - 24 pounds powdered dichlor
    - 2 quarts liquid floc agent
    - 1 gallons sized container Aluminum Sulfate
    - 2 quarts phosphate remover

    Oh, and a new pump motor to boot!

    Along with 50 pounds of de in back flushing.

    Pool was fairly clear about a week ago. Now just trying solve the foaming.

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    Texas Splash's Avatar
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    Re: Foam when adding chlorine

    Holy smokes! Stay far away from that place! Woo!
    Pat (a.k.a. Texas Splash) ~ My Pool: Viking Fiberglass; 17,888 Gal; Waterway Supreme 2-sp/2-hp pump; Hayward Ctg filter; TF-100 w/ Speed Stir
    Vital Links: POOL SCHOOL, RECOMMENDED LEVELS, RECOMMENDED CHEMICALS, Poolmath Calculator, SLAM, Chlorine/CYA CHART.
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    Richard320's Avatar
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    Re: Foam when adding chlorine

    Quote Originally Posted by Waterboy1850 View Post
    Good point, need to sleep in a bit tomorrow!

    Also, here's a little of the cash we have deposited in the quest for clarity over the past 4 weeks:
    - 75 gals shock
    - 24 pounds powdered dichlor
    - 2 quarts liquid floc agent
    - 1 gallons sized container Aluminum Sulfate
    - 2 quarts phosphate remover

    Oh, and a new pump motor to boot!

    Along with 50 pounds of de in back flushing.

    Pool was fairly clear about a week ago. Now just trying solve the foaming.
    Talk about Wheel of Fortune! How many times did you get to spin?

    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Foam when adding chlorine

    Forgot to mention the Partridge in the pear tree!
    ~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~
    Pool: 30k gal IG, Vinyl, Hayward DE, Century 1.5 hp single speed, TF-100, In-line Chlorinator, well water.

    Spa: Dimension One, 350 gal, Bromine

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    Re: Foam when adding chlorine

    The 9 ladies dancing must be the happy dance of the pool $tore owners!

    - - - Updated - - -

    Can you return any of that Glug? I mean garbage.... Or did you open it all?

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    Re: Foam when adding chlorine

    Here's the OCLT results

    last night: FC=7.5, CC=1
    this morning: FC=5.5, CC=1

    Looks like a Memorial SLAM weekend.

    Wish I would have found this site $600 ago!
    ~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~
    Pool: 30k gal IG, Vinyl, Hayward DE, Century 1.5 hp single speed, TF-100, In-line Chlorinator, well water.

    Spa: Dimension One, 350 gal, Bromine

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    Re: Foam when adding chlorine

    Wish I would have found this site $600 ago!
    I understand. So, on you go from here and never look back. Obviously, I have a dog in the fight, but getting that TF-100 kit arms you with the tool you need to have a pristine pool and never visit the pool store again.

    The science in the back of what we do is rock solid and makes perfect common sense. If anything we suggest doesn't make sense you should post up your questions.

    Synopsizing all the good advice above, some of the unneeded stuff that went in your pool is causing the foaming......correct chlorine levels will get rid of it....usually a few days but hard to tell. Your SLAM will most likely take care of all of it and you're in for a trouble free summer

    Welcome to the forum.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: Foam when adding chlorine

    Also just a quick check........you are not using a scented bleach by accident? I accidentally purchased some and didn't realize until I poured it in and it foamed. I immediately stopped pouring and checked the bottle. Oops.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
    http://tftestkits.net/splash-page.html

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    Re: Foam when adding chlorine

    Here's my results of the OCLT
    last night: FC=19, CC=1
    this morning: 16, CC=1

    CYA is 60-70 as best I can tell, once in a while I get readings of 90. Wondering if I am doing this correctly -- TF100 kit directions say to add pool water to bottom of label and then top off with R0013, mix, wait 30 secs and then mix again. Online instructions say to mix for 30 sec. Not sure if this matters. Wondering if I need to wait a bit after shaking to let the air out of the solution.

    pool is crystal clear - I don't recall ever (over past several years) seeing it this clear! It it has been crystal clear for the past 2-3 days.

    Just added another 3 gals of 12.5% liquid pool shock to bump the FC up to 28-29. (BTW - FleetFarm has this on sale now for $2.50/gal)

    I am a little surprised that the CC is staying at 1 and did not drop over the past two OCLT test.
    ~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~
    Pool: 30k gal IG, Vinyl, Hayward DE, Century 1.5 hp single speed, TF-100, In-line Chlorinator, well water.

    Spa: Dimension One, 350 gal, Bromine

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    Re: Foam when adding chlorine

    Don't shake the CYA test (this needs to be changed in the directions) Just invert it gently to mix. Make sure you pour it into the tube with your back to full sun, waist high with quick glances (don't stare at it)

    CC is eliminated by sunlight (UV) so I wouldn't expect it to disappear overnight.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

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    Re: Foam when adding chlorine

    You are doing a great job! Love that you are seeing how great TFP is with the clearer pool! THAT is what it is all about. Just wait until you see it when we are done! It should be even better!

    CYA test-Pour to the first line, GLANCE in and look away, GLANCE in once again. If you see the dot pour to the next line. Keep doing this until you do not see the dot when you GLANCE in. If you stare you will see the dot LOL

    If you want to swim you can IF the FC is just a tad under your SLAM level for you CYA. Just push it back up when you get out.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  18. Back To Top    #18

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    Re: Foam when adding chlorine

    Met all three requirements of the OCLT test this morning: cc=.5, FC less than 1 ppm drop overnight and crystal clear. Pressure in DE filter was stable overnight at about 25 - held tha way for the previous 24 hrs.

    This morning's readings were FC=10.5, CC=.5

    Covered pool with solar cover this morning with pump running.

    Tonight's readings:
    FC=4, CC=.5, p)=7.2, TA=230, CYA=30
    Filter pressure is now 35

    Seems like a large and fast drop in the FC level. Only possibility I can think of is that the solar cover introduced some bio-load after being rolled up all winter.

    Ideas and suggestions?
    ~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~_~
    Pool: 30k gal IG, Vinyl, Hayward DE, Century 1.5 hp single speed, TF-100, In-line Chlorinator, well water.

    Spa: Dimension One, 350 gal, Bromine

  19. Back To Top    #19
    Richard320's Avatar
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    Re: Foam when adding chlorine

    Quote Originally Posted by Waterboy1850 View Post
    Met all three requirements of the OCLT test this morning: cc=.5, FC less than 1 ppm drop overnight and crystal clear. Pressure in DE filter was stable overnight at about 25 - held tha way for the previous 24 hrs.

    This morning's readings were FC=10.5, CC=.5

    Covered pool with solar cover this morning with pump running.

    Tonight's readings:
    FC=4, CC=.5, p)=7.2, TA=230, CYA=30
    Filter pressure is now 35

    Seems like a large and fast drop in the FC level. Only possibility I can think of is that the solar cover introduced some bio-load after being rolled up all winter.

    Ideas and suggestions?
    I think you may be onto something with that. You passed the overnight test so it isn;t something in the pool. And it can't be blamed on the sun since it was covered. That leaves... the cover.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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