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Thread: Held FC over night but it did not change color.

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    Held FC over night but it did not change color.

    .............FC.....PH.....TA...CYA....Add
    Noon........0.....7.5?....?....0.......2 lbs Cya
    1700........0.....7.5?...70...25?....3 cups 4 oz cal-hypo 15ppm/1cup muratic acid
    2200.....12.5.....?.......?....25?....1 cup 2 oz cal-hypo 15ppm
    2230.....15.5.....?.......?....25?....4oz 4tbsp...switched to 18ppm
    2300.....18.5.....?.......?....25?....nothing
    2330.....18.5.....?.......?....25?....nothing

    0900.....18.5.....?.......?....25?....nothing/backwash
    1200.....18.5.....?.......?....25?....backwash/add water
    1800.....15.0.....?.......?....25?....nothing I think the lower ch is because of me adding about 8"of water
    Pool is still green. It didnt change grey or any other color.

    0900.....12.5....7.2....60...25?....nothing/poll is half as green and can see bottom

    0900.....12.0....7.2....70...??......nothing/pool is pretty much clear just have to vacuum up all the dead.
    1500......8.5.....7.2....70...??.....nothing/vacuumed and i can see bottom very well.

    1400......7.5.....7.0....70...??.....nothing/water is pretty clear except for the metal stains.
    11,000g, AG, aqua rite salt, Dough Boy 1.5hp, well water with some metal in it, and 2 beautifull oak trees that dump a ton of leaves into the pool.

    I use TF Test Kit

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    Re: Held FC over night but it did not change color.

    Just keep it up!

    If your CYA is really 25 then you don't need an FC of quite that high. Around 11.5 ppm would be plenty. I see that you have a question mark next to the CYA reading so I'm guessing that you aren't totally certain on that value.

    Just keep the FC at shock level, brush, backwash, test, and repeat until sparkly. Be patient. If you water is cold, it can take a little longer to clear it.
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
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    JasonLion's Avatar
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    Re: Held FC over night but it did not change color.

    Algae will usually bleach out (turn gray/white) when it is dead, but it doesn't always do that. The most reliable way to determine if the algae is all dead is to do an overnight FC loss test. If I am reading your chart correctly, it looks like you already did that and didn't lose any FC overnight.

    Assuming your filter is working correctly, the water should start clearing up as soon as the algae is dead. If you have a sand filter it can take several days to more than a week to completely clear the water, though you should see a visible improvement each day. With DE or cartridge the water should clear up much more quickly than that.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Held FC over night but it did not change color.

    The question marks are because u cant get an acurate reading with so much turbity. So i assumed there was no cya from all the rain this winter. then i added a lil over 2 lbs of stabilizer and the 25ppm was a low estimate. And no where have i seen 11.5 for anything above 20ppm cya.

    Thanks jason i didnt know it wasn't a hard and fast rule that it wouldnt change color and and yes what u read was correct.

    noon update ch=18.5
    11,000g, AG, aqua rite salt, Dough Boy 1.5hp, well water with some metal in it, and 2 beautifull oak trees that dump a ton of leaves into the pool.

    I use TF Test Kit

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    Re: Held FC over night but it did not change color.

    1800 update ch=15.0
    11,000g, AG, aqua rite salt, Dough Boy 1.5hp, well water with some metal in it, and 2 beautifull oak trees that dump a ton of leaves into the pool.

    I use TF Test Kit

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    JasonLion's Avatar
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    Re: Held FC over night but it did not change color.

    It is normal for FC to fall during the day.
    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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    Re: Held FC over night but it did not change color.

    Quote Originally Posted by BigBrownLog
    The question marks are because u cant get an acurate reading with so much turbity. So i assumed there was no cya from all the rain this winter. then i added a lil over 2 lbs of stabilizer and the 25ppm was a low estimate. And no where have i seen 11.5 for anything above 20ppm cya.
    Oh, I see. Turbidity due to the water being green. Understand now.

    See the chart in the link below to determine what your FC needs to be for a given CYA level. This is where that information is sourced.

    pool-school/chlorine_cya_chart_shock
    10K gallon IG gunite with waterfall; Pentair CC320P filter; WhisperFlo 2 HP pump
    TF Test Kits - Pool Math - Pool School
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    Re: Held FC over night but it did not change color.

    @ 257WbyMag - sory i dont know how i never saw that one. i always use bens' or chemgeeks' chart. but by that one i should be somewhere in the neighborhood of 18 anyway as long as i did my math right because the lowest cya is 60.

    @ JasonLion yeah i know the sun leaches aout your CH but i think it was mostly because of the water i added. the sun hits my pool as soon as it comes up and i didn't lose any ch till i added the water. I cant say enough about how much i love this forum you guys have helped so much. thank you.

    Side note i went to the auto store today and i was gonna drive past the pool store so i thought i would take a sample so i wouldnt waste my cya test chemicals. I asked her to filter it and got a puzzled look then i explained. she told me to put copper algicide and a bunch of other stuff they sell and it took everything i had not to ask how they feel about ripping people off every day. I wounder how they explain to people why they have metal stains and that now they need a sequesterant all the time. i know they dont tell them it's because of the copper algicide they told them to put in there. And no one in this town can test over 10ppm ch is this the same with you guys?
    11,000g, AG, aqua rite salt, Dough Boy 1.5hp, well water with some metal in it, and 2 beautifull oak trees that dump a ton of leaves into the pool.

    I use TF Test Kit

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    Re: Held FC over night but it did not change color.

    Quote Originally Posted by BigBrownLog
    @ 257WbyMag - sory i dont know how i never saw that one. i always use bens' or chemgeeks' chart. but by that one i should be somewhere in the neighborhood of 18 anyway as long as i did my math right because the lowest cya is 60.
    The Chlorine/CYA Chart in the Pool School just shows the SWG Pools CYA levels going down to 60 ppm because the recommendation is 60-80 ppm for CYA for such pools, but the shock level is the same as with manually dosed pools (Non-SWG Pools in the first chart). So your 18 ppm FC is fine. As others have noted, it might be on the high side if your CYA was really only 25 ppm but I wouldn't worry about that -- it will just tend to clear the pool faster (assuming the green is all algae and not copper).
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    Re: Held FC over night but it did not change color.

    2 things...

    First, we usually we abbreviate chlorine with TC FC or CC --- total chlorine = free chlorine (the bit that does the disinfecting) + combined chloramines (used up chlorine)
    CH is usually used to mean Calcium Hardness, a value you don't need to be particularly concerned with since you have a vinyl pool

    secondly, What are you using to test your water? you will find that most pool stores don't test very accurately, don't know very much and are in it to make a buck.

    8000 gallon 20' x 48" round vinyl frame pool, 12" sand filter (don't have the specs on the pump), TF100 test kit
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    frustratedpoolmom's Avatar
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    Re: Held FC over night but it did not change color.

    Quote Originally Posted by BigBrownLog
    And no one in this town can test over 10ppm ch is this the same with you guys?
    In the stores around here that's true too, even better some stores use computer read strips! and that's another reason why I'm so greatful for this forum and the FAS-DPD test! What I don't understand is why the pool stores don't use it for testing. Makes no sense.
    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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    Re: Held FC over night but it did not change color.

    update 0900 12.5 FC - PH 7.2 - TA 60 as long as the high FC didnt mar the other 2 tests

    .
    @ chem geek yeah this is the only one i really ever use http://www.troublefreepool.com/chlor...art-t2346.html and since i have had yellow mustard before i just assume that is ths case now since it lools the same. Thats where i got the 18ppm.

    @ The Mermaid Queen thanks for reminding me it's been a while since i've been on here. oh yeah i know they dont test very accurately. I just get a kick outta goin there sometimes.

    @ frustratedpoolmom yeah i dont get it either it's not like the extra overhead of a better testkit would put there stealing ***** under.
    11,000g, AG, aqua rite salt, Dough Boy 1.5hp, well water with some metal in it, and 2 beautifull oak trees that dump a ton of leaves into the pool.

    I use TF Test Kit

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    Re: Held FC over night but it did not change color.

    update
    FC PH TA CYA ADD
    0900.....12.0.....7.2.....70.....??.....nothing/just need to vacuum the dead.

    Im clueless on what the CYA is because i just added it recently, it has rained, i used shock, it hasn't lost much FC at all durring the day so I suspect it is 30ppm or higher, and I'm gonna be changing out the sand as soon as the pool is sparkling.

    Anyone have any suggestions on replacing the sand? I already bought the sand. I was just wondering on technique to make it go smoothly. Also is there any special care i should take with introducing the new sand? Should i do anything special in the first couple of weeks?
    11,000g, AG, aqua rite salt, Dough Boy 1.5hp, well water with some metal in it, and 2 beautifull oak trees that dump a ton of leaves into the pool.

    I use TF Test Kit

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    frustratedpoolmom's Avatar
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    Re: Held FC over night but it did not change color.

    Please do me a favor.
    Take a small amount of pool water and pour it into the CYA view tube and tell me if you can see the dot. Straight pool water, no testing reagents.

    Also check out this link for helpful tips on the CYA test.
    http://www.taylortechnologies.com/Ch...P?ContentID=44

    What color is the pool water now? Are you doing an "overnight test" to see if the FC is holding?
    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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    Re: Held FC over night but it did not change color.

    update
    ............FC......PH.....TA....CYA.....ADD
    1500.....8.5.....7.2.....70.....??.....nothing/vacuumed and i can see bottom very well.

    @ frustratedpoolmom. Yeah i can see the dot. if you look at my first post it has all the updates also. on the third day it was clear enough to see bottom. But as i said i dont wanna use my last CYA test just yet because i am gonna change the sand soon. from yesterday morning till this morning i only had a loss of .5 gonna do one more overnight test tonight. Looks like I lost quite a bit of CYA from backwashing and it raining. I'll know for sure tomorrow.
    11,000g, AG, aqua rite salt, Dough Boy 1.5hp, well water with some metal in it, and 2 beautifull oak trees that dump a ton of leaves into the pool.

    I use TF Test Kit

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    frustratedpoolmom's Avatar
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    Re: Held FC over night but it did not change color.

    If you can see the black dot then turbidity isn't an issue for the CYA test.
    Can you post a pic? If your FC is holding, then perhaps the issue is not organic.
    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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    Re: Held FC over night but it did not change color.

    yeah i know that the turbidity it's not an issue now. It hasnt been since yesterday I just dont wanna use my last test till i get the new sand in along with the new conditioner. I will have the pool store check it for now (gonna go there tomorrow) since it is not really an issue to know the exact amount I have right now. And im not gonna spend the money to put some in now when i will loose alot of it from changing the sand.

    i got a lil drunk last night and forgot to do a test last night. Im pretty sure it's organic since the chlorine cleared up the water in just a few days. now i just have to worry about the metal stains.
    update

    ...........FC....PH....TA....ADD
    1400....7.5....7.0....70....nothing pool looks pretty clear except for the metal stains. i'll post pics later
    11,000g, AG, aqua rite salt, Dough Boy 1.5hp, well water with some metal in it, and 2 beautifull oak trees that dump a ton of leaves into the pool.

    I use TF Test Kit

  18. Back To Top    #18
    frustratedpoolmom's Avatar
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    Re: Held FC over night but it did not change color.

    Oh, I didn't realize the water had cleared. Thought it was still green!
    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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