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Thread: Gallons and gallons of bleach and stlll no FC???? What gives?

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    Gallons and gallons of bleach and stlll no FC???? What gives?

    Hello all, I'm new to the forum. This site is awesome and I've learned a lot and continue to every time I log onto it. My problem is that I've been trying to SLAM my pool with very little luck. Currently, I can't personally check the CYA level. According to the pool store, my CYA was 45, but we've since added about 700 gal and it has rained a little for the last couple of days. I understand that the CYA will drop with water addition, but didn't think 700 gal would drop it so low that the sun would cook it all off. Am I mistaken? Water is crystal clear!! I've added bleach, according to PoolMath, several times but the Cl is always very low after letting it circulate. I SLAMed it yesterday afternoon. It circulated for 13-14 hours, while I was at work. I checked it this morning when I got home from work, and my FC was about a 2, so I SLAMed it again. Checked it about 7 hrs later and again, my FC was about a 2. SLAMed it again before leaving for work and threw the floater back in to try and help increase CYA. I had my wife check it again about 6 hrs later, and lo and behold.......FC is a 2 again. CC is 0. I'm waiting on my TF-100 kit to arrive this week, but currently have to "trust" the late teen, early 20's pool store "professional" to run my CYA. So far 3 gals of 6% bleach and about 3 1/2 gal of 10% bleach used. What am I doing wrong?! Thanks in advance!

    FC 2
    CC 0
    pH 7.5 (in the process of aerating to lower TA)
    TA 160
    CYA ?? was 45 on Saturday before 700 gal water addition and a couple of light rains
    Pool: 9800 gal AG filled w/ well water. Approx 10-11 yrs old with a StaRite T-180WF sand filter 1.57 sqft
    Pump: Hayward Power-Flo Matrix 1.5HP single speed
    Hayward Aqua Critter vac.
    TF-100 Test Kit w/ SpeedStir

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    Texas Splash's Avatar
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    Gallons and gallons of bleach and stlll no FC???? What gives?

    Hello and welcome to TFP! Unfortunately, you are just stuck until that TF-100 arrives. No sweat. Just wait. You can add 1/2 gallon of regular bleach each evening and just wait. Your CYA could be completely different from what you heard before. No sense wasting energy. Post those TF-100 numbers when you get it and we'll go from there. Great to have you with us.
    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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    Gallons and gallons of bleach and stlll no FC???? What gives?

    UGGG!! Not what I was hoping to hear. LOL My 10 yr old is wanting swim......BAD! Guess he can swim in it till then, huh? Thanks for the reply!
    Pool: 9800 gal AG filled w/ well water. Approx 10-11 yrs old with a StaRite T-180WF sand filter 1.57 sqft
    Pump: Hayward Power-Flo Matrix 1.5HP single speed
    Hayward Aqua Critter vac.
    TF-100 Test Kit w/ SpeedStir

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    Gallons and gallons of bleach and stlll no FC???? What gives?

    If my FC level was 2 and my water was clear I would happily swim in it.

    Now - there is some chance that you've added a lot of chlorine and the test is bleaching out and giving a false low reading. Can you confirm how much chlorine you've added?
    16K Gal Plaster | Compupool SWG | Intelliflow VF | TF-100

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    Mod Squad pooldv's Avatar
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    Gallons and gallons of bleach and stlll no FC???? What gives?

    It is safe to swim when
    FC is above minimum for your CYA, so the water is safe and sanitary
    FC is up to shock level for your CYA, FC/CYA Chart
    PH is 7.2 to 7.8
    Water is clear
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    PAGirl's Avatar
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    Gallons and gallons of bleach and stlll no FC???? What gives?

    SLAMming is a process. The more often you can check and add (after you get your kit) the faster it will go. Checking an hour after adding, at least at first can be ideal.
    26' X 52" Intex Ultra Frame. Intex Sand Filter
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    You can lead a horse to (clear) water, but you can't force him to swim in it!

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    Gallons and gallons of bleach and stlll no FC???? What gives?

    Quote Originally Posted by lightingguy View Post
    If my FC level was 2 and my water was clear I would happily swim in it.

    Now - there is some chance that you've added a lot of chlorine and the test is bleaching out and giving a false low reading. Can you confirm how much chlorine you've added?
    Confirm as in did I really put that much bleach in?


    Quote Originally Posted by pooldv View Post
    It is safe to swim when
    FC is above minimum for your CYA, so the water is safe and sanitary
    FC is up to shock level for your CYA, FC/CYA Chart
    PH is 7.2 to 7.8
    Water is clear
    Thanks!!

    Quote Originally Posted by PAGirl View Post
    SLAMming is a process. The more often you can check and add (after you get your kit) the faster it will go. Checking an hour after adding, at least at first can be ideal.
    I'm quickly learning that. LOL
    Pool: 9800 gal AG filled w/ well water. Approx 10-11 yrs old with a StaRite T-180WF sand filter 1.57 sqft
    Pump: Hayward Power-Flo Matrix 1.5HP single speed
    Hayward Aqua Critter vac.
    TF-100 Test Kit w/ SpeedStir

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    Gallons and gallons of bleach and stlll no FC???? What gives?

    It's a big learning curve at first. Hang in there. Don't make any significant changes until your kit arrives except for adding the 1/2 jug of bleach like Texas Splash suggested.
    Last edited by MarianParoo; 07-26-2016 at 11:42 PM. Reason: Lots of grammatical errors. Thumbs stink.

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    Gallons and gallons of bleach and stlll no FC???? What gives?

    Quote Originally Posted by MarianParoo View Post
    It's a big learning curve at first. Hang in there. Don't make any significant changes unt your kit arrives except for addi g the 1/2 jug of bleach like TA as Splash suggested.
    Learning curve is an understatement. I was adding bleach and checking several hours later. I think I misunderstood the process. I need to be off of work to do the SLAM correctly so I can keep a close eye on it and keep the FC at SLAM level.
    Pool: 9800 gal AG filled w/ well water. Approx 10-11 yrs old with a StaRite T-180WF sand filter 1.57 sqft
    Pump: Hayward Power-Flo Matrix 1.5HP single speed
    Hayward Aqua Critter vac.
    TF-100 Test Kit w/ SpeedStir

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    Gallons and gallons of bleach and stlll no FC???? What gives?

    No worries. We ALL had to learn and navigate through pH this, FC that, CYA, huh??? etc. etc.

    Relax. We can help!!!!

    It is not advisable to try to slam without REALLY being able to home test. Now you have to be patient and wait for that testkit to arrive. Just the half jug for now.

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    Gallons and gallons of bleach and stlll no FC???? What gives?

    Quote Originally Posted by dwwilliams72 View Post
    Confirm as in did I really put that much bleach in?
    I was just curious how many gallons of bleach have gone into the pool?
    16K Gal Plaster | Compupool SWG | Intelliflow VF | TF-100

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    Gallons and gallons of bleach and stlll no FC???? What gives?

    Quote Originally Posted by lightingguy View Post
    I was just curious how many gallons of bleach have gone into the pool?
    I've put 3 gal of 6% and 3 1/2 gal of 10% since Saturday, but after reading more, that may be normal for a SLAM procedure. My problem is that I've been waiting several hours between testing the water and I'm not certain of my CYA level. Once I receive my TF-100, I'll check the CYA and go from there.
    Pool: 9800 gal AG filled w/ well water. Approx 10-11 yrs old with a StaRite T-180WF sand filter 1.57 sqft
    Pump: Hayward Power-Flo Matrix 1.5HP single speed
    Hayward Aqua Critter vac.
    TF-100 Test Kit w/ SpeedStir

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    Re: Gallons and gallons of bleach and stlll no FC???? What gives?

    TF-100 arrived yesterday. Tested water this morning:

    pH 7.5
    FC 7
    CC 1
    TA 430 ?!? (tested it with my old Leslie's kit and it showed 160) Added MA to try to get TA down.
    CYA <20

    Tested again about 1:45 pm

    pH 7.5
    TA 160 (matched old Leslie's kit results Not sure what I did wrong on the morning test)

    Question regarding CYA. If it's below 20, how do I determine correct amount of CYA to add? Is it safe to swim if FC is @ 7 with CYA is below recommended level? My 10 year old is chomping at the bit to swim.
    Pool: 9800 gal AG filled w/ well water. Approx 10-11 yrs old with a StaRite T-180WF sand filter 1.57 sqft
    Pump: Hayward Power-Flo Matrix 1.5HP single speed
    Hayward Aqua Critter vac.
    TF-100 Test Kit w/ SpeedStir

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    Re: Gallons and gallons of bleach and stlll no FC???? What gives?

    CYA......you sure that dot was visible up to the 20 mark? Did you do the test in full sun with your back to the sun? Lighting is very important for that one test.

    It is safe to swim at shock level for your CYA Pool School - Chlorine / CYA Chart

    How much to add? Use pool math link at the top of the web page and put your pool volume in the top and your "now" readings as well as your targets. It will calculate for you.
    18*36*23 true "L" vinyl IG 29,000 gallons. SWG. TF-100 test kit.
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    Re: Gallons and gallons of bleach and stlll no FC???? What gives?

    Quote Originally Posted by AimeeH View Post
    CYA......you sure that dot was visible up to the 20 mark? Did you do the test in full sun with your back to the sun? Lighting is very important for that one test.

    It is safe to swim at shock level for your CYA Pool School - Chlorine / CYA Chart

    How much to add? Use pool math link at the top of the web page and put your pool volume in the top and your "now" readings as well as your targets. It will calculate for you.
    It was past the 20 mark. Almost to the top of the vial. I tested inside before the sun came up and I could easily see the black dot. The Chlorine/CYA chart only goes down to 20. If I'm below that, I don't know if 7 FC is safe or too high.
    As far as how much CYA to add, I guess I can start out as if I'm at 20 now, then check it again. If it's still below, say 40, I should be able to increase after testing again?
    Pool: 9800 gal AG filled w/ well water. Approx 10-11 yrs old with a StaRite T-180WF sand filter 1.57 sqft
    Pump: Hayward Power-Flo Matrix 1.5HP single speed
    Hayward Aqua Critter vac.
    TF-100 Test Kit w/ SpeedStir

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    Re: Gallons and gallons of bleach and stlll no FC???? What gives?

    The CYA test should be done outdoors in full sunlight with your back to the sun. Results indoors are usually inaccurate. You also have to make sure you mix it fairly vigorously before pouring it into the vial.
    50,000 gallon plaster in-ground salt pool with two 60 sq ft DE filters, two Intellichlor IC60 SWGs, two Intelliflo VS pumps, two Whisperflo pumps, two Pentair 400K BTU NG heaters, PCC2000 in-floor cleaning system...two everything.

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    Re: Gallons and gallons of bleach and stlll no FC???? What gives?

    Quote Originally Posted by AimeeH View Post
    CYA......you sure that dot was visible up to the 20 mark? Did you do the test in full sun with your back to the sun? Lighting is very important for that one test....
    Checked the CYA again today, in the sun with my back turned and held the vial at waist level, and got basically the same result. <20 CYA. Then I ran the CYA standard test to check my method, and got just slightly under 50, so my method is right. In the morning when I get off work, I'm going to pretend my CYA is at 20 and use the PoolMath calc and go with what it recommends. That should put me somewhere between 20-40. Then I'll recheck to get a better idea of where it is and go from there. I have to get the CYA up! Until then, I'm going through Cl like crazy!!!
    Pool: 9800 gal AG filled w/ well water. Approx 10-11 yrs old with a StaRite T-180WF sand filter 1.57 sqft
    Pump: Hayward Power-Flo Matrix 1.5HP single speed
    Hayward Aqua Critter vac.
    TF-100 Test Kit w/ SpeedStir

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    Re: Gallons and gallons of bleach and stlll no FC???? What gives?

    Quote Originally Posted by dwwilliams72 View Post
    Checked the CYA again today, in the sun with my back turned and held the vial at waist level, and got basically the same result. <20 CYA. Then I ran the CYA standard test to check my method, and got just slightly under 50, so my method is right. In the morning when I get off work, I'm going to pretend my CYA is at 20 and use the PoolMath calc and go with what it recommends. That should put me somewhere between 20-40. Then I'll recheck to get a better idea of where it is and go from there. I have to get the CYA up! Until then, I'm going through Cl like crazy!!!
    Good plan


    50,000 gallon plaster in-ground salt pool with two 60 sq ft DE filters, two Intellichlor IC60 SWGs, two Intelliflo VS pumps, two Whisperflo pumps, two Pentair 400K BTU NG heaters, PCC2000 in-floor cleaning system...two everything.

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