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Thread: confused about algae / c.c. test

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    delfargo's Avatar
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    confused about algae / c.c. test

    man, things were going so good i thought i was done bugging you guys & gals this summer. my pool was a green swamp when i opened. i fought with it long & hard with great advice from all you pool gurus and finally got the water clean & clear and have had no problems since early june. then a couple of weeks ago i started getting spots (yellow-geenish-gray) on the bottom, but only on the west end.
    figured it was just dirty so i vacumed. a day later the spots were back. vacumed again, then went out of town for a couple of days. before i left i jacked the clorine level up to about 20 and left the pump on. when i got back the entire west side of my pool bottom was covered with this stuff. from what i've been reading on some other posts here it seems like it might be mustard algae.
    what has me confused is my clorine level has been holding no problem and testing c.c. at 0 - i was under the impression that the c.c. test was to determine if the clorine was actively fighting something. how could i have been getting algae if the c.c. has been testing fine for over a month?
    just to let you know what this stuff is - it's the stuff where if you swim down to the bottom and wave your hand at it it turns into a greenish cloud and goes away. i tried to get a sample to bring to the surface but it just turns into nothing. it's like it disappears. it is only on the west side of the pool (my return jet is on the south end, forcing the water in a northeasterly direction) so i figure it's settling to the bottom there before it has a chance to make it to the skimmer. i must be filtering some of it out, as the skimmer sock gets all gunked up with yellow goo after a couple of days.
    i've been trying to vacume it, but it seems i'm stirring it up more than vacuming it out. when i try to vacume the water just turns all cloudy.
    so i let it be for a day or 2 and the water clears up but when you look in there and you can see a nice clean blue bottom on the east side and this disgusting dark yellow bottom on the west side. so i try to vacume it up again, water clouds up, water clears, dark yellow **** settles back to the west side. i've been doing this over & over for 2 weeks now. all the while, my clorine still reads fine, c.c. fine. what gives? do i need to go back to the "shock the heck out of it" phase where i'm going through 20 gallons of bleach a week?
    i tell ya what, i'm about ready to put a sign in my yard that reads "free pool - you tear it down, it's yours"
    any advice? i'm about out of "p.o.p.".
    thanx alot...again.
    30' round above ground - 21000 gal. (shade ONLY in the evening),
    pentair dynamo 1.5 hp pump,
    pentair sand dollar 150 lb.sand filter,
    bbb method.

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    Re: confused about algae / c.c. test

    It does sound like mustard/yellow algae to me from what you describe. There have been posts on here describing how to keep your pools FC at a Mustard Algae level to get rid of it and also how you don't have to have CC to have algae, there are alternatives;I personally use yellow treat for persistent algae like this.
    -Kevin
    X-Pert Pool Service
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    22,000 gal / 16' x 32' / Vinyl / Hayward s244t /Pentair SuperFlo 1 hp

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    Re: confused about algae / c.c. test

    I had a green algae outbreak a month or so ago; in three days of shocking, tested chlorine a dozen times, and never had CC over 0.5. An elevated CC tells you something is bad; a low CC does not tell you everything is good.

    So yes you need to shock, and you've been letting it grow for a couple weeks so it might take a while to clear up.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

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    Re: confused about algae / c.c. test

    Hi, delfargo,
    i've been doing this over & over for 2 weeks now. all the while, my clorine still reads fine, c.c. fine.
    I think you'll find that you haven't been using adequate levels of chlorine. in adequate amounts, chlorine kills algae.....that is the truth.

    I believe if you shock your pool according to the shock process found in Pool School and then maintain your chlorine according to the CYA/chlorine chart found in Pool School, you pool propblems will go away and you can enjoy the rest of the summer.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Krickett's Avatar
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    Re: confused about algae / c.c. test

    I agree with duraleigh. Be sure you know what you CYA level is and shock for mustard algae (just in case that is what it is as opposed to just regular algae). You shouldn't need to go through so much chlorine this time. Based on your post it sounds like you had a bad case of algae the first time which does require a lot more chlorine to clean up, but this time it should go much quicker and with less cost as long as you follow the proper shocking guidelines. Once gone, be sure to keep your pool at normal levels. Hang in there I know what your going through all too well.
    21k gal, plaster IG pool with spa
    Main - 1 skimmer, 1 main drain, 3 returns, Spa - 1 drain, 4 returns
    WhisperFlo Dual Speed WFDS 1.5 HP pump
    S310S 30" sand filter
    Polaris 360 pressure cleaner

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    Ohm_Boy's Avatar
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    Re: confused about algae / c.c. test

    You should post your test results.
    [center:1kpalu48]Helpful Links: Pool School | CYA/Chlorine Chart | Pool Calculator[/center:1kpalu48]

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    Re: confused about algae / c.c. test

    Quote Originally Posted by delfargo
    man, things were going so good i thought i was done bugging you guys & gals this summer. my pool was a green swamp when i opened. i fought with it long & hard with great advice from all you pool gurus and finally got the water clean & clear and have had no problems since early june. then a couple of weeks ago i started getting spots (yellow-geenish-gray) on the bottom, but only on the west end.
    figured it was just dirty so i vacumed. a day later the spots were back. vacumed again, then went out of town for a couple of days. before i left i jacked the clorine level up to about 20 and left the pump on. when i got back the entire west side of my pool bottom was covered with this stuff. from what i've been reading on some other posts here it seems like it might be mustard algae.
    what has me confused is my clorine level has been holding no problem and testing c.c. at 0 - i was under the impression that the c.c. test was to determine if the clorine was actively fighting something. how could i have been getting algae if the c.c. has been testing fine for over a month?
    just to let you know what this stuff is - it's the stuff where if you swim down to the bottom and wave your hand at it it turns into a greenish cloud and goes away. i tried to get a sample to bring to the surface but it just turns into nothing. it's like it disappears. it is only on the west side of the pool (my return jet is on the south end, forcing the water in a northeasterly direction) so i figure it's settling to the bottom there before it has a chance to make it to the skimmer. i must be filtering some of it out, as the skimmer sock gets all gunked up with yellow goo after a couple of days.
    i've been trying to vacume it, but it seems i'm stirring it up more than vacuming it out. when i try to vacume the water just turns all cloudy.
    so i let it be for a day or 2 and the water clears up but when you look in there and you can see a nice clean blue bottom on the east side and this disgusting dark yellow bottom on the west side. so i try to vacume it up again, water clouds up, water clears, dark yellow **** settles back to the west side. i've been doing this over & over for 2 weeks now. all the while, my clorine still reads fine, c.c. fine. what gives? do i need to go back to the "shock the heck out of it" phase where i'm going through 20 gallons of bleach a week?
    i tell ya what, i'm about ready to put a sign in my yard that reads "free pool - you tear it down, it's yours"
    any advice? i'm about out of "p.o.p.".
    thanx alot...again.
    I could have written this post nearly word for word except the sock don't know what that is!!!! Location, direction of skimmer/return everything!
    Then I looked at your location! We're probably neighbors!!
    21x41x54" AG Artesian Seville II
    Installed around 2004 - we moved here in 2008
    23,000 gal
    Hayward SwimPro 256T Sand Filter
    1HP 2speed Hayward Power Flo Matrix
    (and have 2HP Hayward Swimpro and a 2hp 2speed Waterway Hi-Flo pump as back up also!! lol)
    No heating - other than Solar SunRings
    Central IL

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    Heckpools's Avatar
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    Re: confused about algae / c.c. test

    i'll agree with kevin and say your best bet is to use "yellow treat" and follow the directions on the bottle. Ive used it and have had great results
    [center:3gj9kdnn]Matt Heck
    "HECK OF A POOL SERVICE LLC"
    Serving Ocean co. NJ
    COMPANY INFO BELOW
    http://maps.google.com/maps/place?hl=en ... 2995187987[/center:3gj9kdnn]

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    frustratedpoolmom's Avatar
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    Re: confused about algae / c.c. test

    Chlorine. Chlorine. Chlorine.

    Repeat.
    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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    Bob_Funk's Avatar
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    Re: confused about algae / c.c. test

    You know you have a problem now, but in the future an overnight free chlorine loss test, is how to tell if something is growing in your pool, it is also how you will know when you are done shocking for your problem now.

    pool-school/overnight_fc_test
    I consider myself very lucky I found this site before the pool store found me-pool owner since Nov 2008- Stunningly clear 17,000 gal fiberglass pool, thanks to this site, installed in 1982-24" 3.1sq. ft sta-rite sand filter, 1 hp - 2 speed wisperflo pump-WFDS-4

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    delfargo's Avatar
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    Re: confused about algae / c.c. test

    so, shock level for mustard algae is DIFFERENT than "regular" shock level? i've been trying to find what that would be. where on this site would i find such information?
    haven't tested cya in several weeks, as i ran out of the solution for that test, but it had always tested right around 35, so i'm assuming that is still about where it is. thanx.
    30' round above ground - 21000 gal. (shade ONLY in the evening),
    pentair dynamo 1.5 hp pump,
    pentair sand dollar 150 lb.sand filter,
    bbb method.

  12. Back To Top    #12

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    Re: confused about algae / c.c. test

    The Pool School Chlorine/CYA chart shows both regular and mustard shock levels.

    You do not need to test often for CYA, as a rule it does not change unless you add some or lose a fair amount of water from backwashing, draining, leak, splashout, etc (evaporation won't affect it). Many people test just 2-3x per season once it's in the right place.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  13. Back To Top    #13
    delfargo's Avatar
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    Re: confused about algae / c.c. test

    o.k... am i blind ? i'm looking at the clorine/cya chart and i am not seeing anything 'bout mustard algae shock level.
    30' round above ground - 21000 gal. (shade ONLY in the evening),
    pentair dynamo 1.5 hp pump,
    pentair sand dollar 150 lb.sand filter,
    bbb method.

  14. Back To Top    #14

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    Re: confused about algae / c.c. test

    That'll teach me to post a link without looking at it first
    You're right, that chart just has normal shock levels. The Pool Calculator will give you a separate mustard algae level (see Suggested FC Levels near the bottom of the colored section).
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  15. Back To Top    #15
    frustratedpoolmom's Avatar
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    Re: confused about algae / c.c. test

    There's a link at the bottom to Richard's chart where it gives the MA levels
    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

  16. Back To Top    #16
    Ohm_Boy's Avatar
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    Re: confused about algae / c.c. test

    Here's a direct link to Richard's chart
    http://www.troublefreepool.com/chlor...art-t2346.html
    [center:1kpalu48]Helpful Links: Pool School | CYA/Chlorine Chart | Pool Calculator[/center:1kpalu48]

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