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Thread: Mustard Algae ??

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    cnatra's Avatar
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    Mustard Algae ??

    So with the wife & kids gone for over a week my OCD with the pool is kicking in & I've been concerned (after being out of town the previous 10days)
    that maybe some algae is trying to take hold in the pool

    here's a previous thread on what I had done after returning from vacation

    http://www.troublefreepool.com/threa...lamming-needed


    morning of July 12

    FC 3 CC 0 PH 7.6 TA 70 CH 290 CYA 50

    I poured 16oz of 53% cal hypo in the pool yesterday around 2pm

    So last night after work I stopped at Wal Mart & got 8 jugs of Great Value 8.25% bleach (121oz bottles)
    & poured all of that into the pool at 2:30am , so the FC should have been 29+ after that

    at 11:45am I'm getting a FC of 14.2 (avg of one 25ml test & two 10ml tests) with CC .2

    So definite algae issue ? probably mustard algae ??

    I almost always get a little "cloud" off the steps & benches when I brush (figured dust/dirt that had settled)
    & sometimes to a lesser extent on the deep end walls near the waterfall

    I had a smaller more basic pool with traditional white plaster over a dozen years ago & algae was easy to spot
    With this pebble finish though how can one see it growing ???



    - - - Updated - - -

    oh I did run the waterfall for about an hour at 9am before I tested the water
    maybe the algae is hiding in/on the waterfall ??
    23k gunite, Stonescapes Mini Aqua Blue w/seashell, Pentair CCP520 cartridge filter, 2 Pentair Intelli-Flo VS pumps, Pentair Mastertemp 400, Pentair EasyTouch 8+wireless controller, Silencer spa blower, 3 Intellibrite LEDs, Pentair Racer cleaner, Pentair 320 chlorinator
    my build http://www.troublefreepool.com/threa...-north-Houston

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    Mod Squad tim5055's Avatar
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    Re: Mustard Algae ??

    You said "FC should have been 29+ after that", but did you test?

    Don't decide you have algae just because.

    I always get little clouds when I brush. Pollen, dirt plaster dust and the like will cause clouds.

    Do an OCLT tonight and be sure what is going on before you push the panic button.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    cnatra's Avatar
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    Re: Mustard Algae ??

    Quote Originally Posted by tim5055 View Post
    You said "FC should have been 29+ after that", but did you test?

    Don't decide you have algae just because.

    I always get little clouds when I brush. Pollen, dirt plaster dust and the like will cause clouds.

    Do an OCLT tonight and be sure what is going on before you push the panic button.
    okey doke

    just added 512oz of 10% bleach

    - - - Updated - - -



    - - - Updated - - -



    - - - Updated - - -

    more recent pics for reference , water is usually very clear , though it's been reaching 92 degrees lately

    after 4 months since the pool was done I think i'll finally clean filter in a few days , maybe there's some built up gunk in there
    23k gunite, Stonescapes Mini Aqua Blue w/seashell, Pentair CCP520 cartridge filter, 2 Pentair Intelli-Flo VS pumps, Pentair Mastertemp 400, Pentair EasyTouch 8+wireless controller, Silencer spa blower, 3 Intellibrite LEDs, Pentair Racer cleaner, Pentair 320 chlorinator
    my build http://www.troublefreepool.com/threa...-north-Houston

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    Re: Mustard Algae ??

    Quote Originally Posted by tim5055 View Post
    You said "FC should have been 29+ after that", but did you test?

    When I added the initial dose of 8 121oz bottles @ 8.25% that would have raised the FC to 28 all by itself even if I had started at a FC of 0

    But since then I've added (4 gallons) 512oz of 10% bleach that would elevate the FC +18 after measuring a FC of 14.2

    And last night I did another 726oz of 8.25% bleach that would net a FC increase of 21 after measuring a FC 9.2 & CC .2

    This evening (7:30pm) I'm at FC 6.2 & CC 0


    All of that chlorine used up inside of 41 hours ????????????


    Tomorrow night I'll have time to do an OCLT after having it elevated again to 28-30

    The pump stays on for an OCLT , correct ?

    23k gunite, Stonescapes Mini Aqua Blue w/seashell, Pentair CCP520 cartridge filter, 2 Pentair Intelli-Flo VS pumps, Pentair Mastertemp 400, Pentair EasyTouch 8+wireless controller, Silencer spa blower, 3 Intellibrite LEDs, Pentair Racer cleaner, Pentair 320 chlorinator
    my build http://www.troublefreepool.com/threa...-north-Houston

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    Re: Mustard Algae ??

    So at 9pm on July 14 I added 256oz of 10% bleach to elevate the FC to 14.7 (after measuring a FC 6 )

    I measured FC 7.4 CC .2 at 3:30pm July 15 and at 9:40pm the FC was 6 & CC 0

    I then added 847oz of 8.25% bleach to raise the FC by 24 to a FC level of 30 at 9:30pm on July 15

    At 7:15am 25ml test was FC 22.8 CC 0 & the 10ml test was FC 25 CC .2

    Any insight ?

    The water does (surprisingly) seem clearer & I'm getting NO clouding when I brush the steps & walls now FWIW
    23k gunite, Stonescapes Mini Aqua Blue w/seashell, Pentair CCP520 cartridge filter, 2 Pentair Intelli-Flo VS pumps, Pentair Mastertemp 400, Pentair EasyTouch 8+wireless controller, Silencer spa blower, 3 Intellibrite LEDs, Pentair Racer cleaner, Pentair 320 chlorinator
    my build http://www.troublefreepool.com/threa...-north-Houston

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    Mod Squad jblizzle's Avatar
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    Re: Mustard Algae ??

    With a CYA of 50ppm, that lose does seem a bit high ... the water sure looks nice

    Hopefully the OCLT will pass and you can get back to maintenance.

    My pool right now is filthy after being gone for 10 days, but there is not algae. Clouds billow when I brush, but it is likely mostly just dirt ... I need to get my robot in there and clean it up.
    Jason, TFP Moderator
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    Re: Mustard Algae ??

    Quote Originally Posted by jblizzle View Post
    With a CYA of 50ppm, that lose does seem a bit high ... the water sure looks nice

    Hopefully the OCLT will pass and you can get back to maintenance.

    My pool right now is filthy after being gone for 10 days, but there is not algae. Clouds billow when I brush, but it is likely mostly just dirt ... I need to get my robot in there and clean it up.
    I want a robot !!!

    I think maybe something had started while I was on vacation & hopefully now it's gone

    I wonder how much of an issue these rock waterfalls are as far as a "home" for algae to grow ?
    (been running the waterfall pump for 1hr each time I bump the chlorine)
    23k gunite, Stonescapes Mini Aqua Blue w/seashell, Pentair CCP520 cartridge filter, 2 Pentair Intelli-Flo VS pumps, Pentair Mastertemp 400, Pentair EasyTouch 8+wireless controller, Silencer spa blower, 3 Intellibrite LEDs, Pentair Racer cleaner, Pentair 320 chlorinator
    my build http://www.troublefreepool.com/threa...-north-Houston

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    Mod Squad jblizzle's Avatar
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    Re: Mustard Algae ??

    At previous house I had noticed that algae would grow in the water pooled at the top of the water fall when it was not run often.
    I have a bunch of algae that keep growing in my auto-fill pipe I now occasionally put a little bleach in the auto-fill bucket.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: Mustard Algae ??

    now I'm really stumped , 8:15pm FC 6 cc .2



    think I need to do a few CYA retests in the morning , 17-19 point FC loss in 13hrs seems crazy

    maybe the wal-mart brand bleach isn't all it's cracked up to be ????
    23k gunite, Stonescapes Mini Aqua Blue w/seashell, Pentair CCP520 cartridge filter, 2 Pentair Intelli-Flo VS pumps, Pentair Mastertemp 400, Pentair EasyTouch 8+wireless controller, Silencer spa blower, 3 Intellibrite LEDs, Pentair Racer cleaner, Pentair 320 chlorinator
    my build http://www.troublefreepool.com/threa...-north-Houston

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    Re: Mustard Algae ??

    Why are you going so high with the SLAM?
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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    Re: Mustard Algae ??

    Quote Originally Posted by Casey View Post
    Why are you going so high with the SLAM?
    I was going to mustard algae slam levels & pool math was indicating FC 29 on that

    I'm beginning to wonder if my CYA tests have been way off
    we've had enough rain to force water out via the overflow drain a few times over the last month but that shouldn't eliminate that much CYA , right ?

    I just redid all the tests (I was a bit distracted by a phone call on earlier FC/CC test)

    FC 6.2 CC 0 PH 7.6 TA 70 CH 300 CYA should be 40-50

    I'll be doing a few CYA tests as soon as the sun is up enough in the morning
    23k gunite, Stonescapes Mini Aqua Blue w/seashell, Pentair CCP520 cartridge filter, 2 Pentair Intelli-Flo VS pumps, Pentair Mastertemp 400, Pentair EasyTouch 8+wireless controller, Silencer spa blower, 3 Intellibrite LEDs, Pentair Racer cleaner, Pentair 320 chlorinator
    my build http://www.troublefreepool.com/threa...-north-Houston

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    Re: Mustard Algae ??

    Well I've had some free time to spend on the pool again the last couple of days.

    Think I discovered part of the problem , my CYA readings have been off !!!

    I had hit a CYA of 30 back in early May & then added enough to get to 40+ by early June.

    I thought I had added enough additional liquid "conditioner" (CYA) a few weeks ago to get to 50 but after several tests I was only showing maybe a CYA of 30 yesterday.

    I guess enough water drained out of the overflow with the heavy rains we've had to dilute it back down AND when I looked in the bottle of liquid CYA there was a large clump about 3inches in diameter in the bottom of the bottle. So I added enough water (several times) to the bottle to dilute & flush all of that out & into the pool.

    Will be checking CYA again by end of the week.
    23k gunite, Stonescapes Mini Aqua Blue w/seashell, Pentair CCP520 cartridge filter, 2 Pentair Intelli-Flo VS pumps, Pentair Mastertemp 400, Pentair EasyTouch 8+wireless controller, Silencer spa blower, 3 Intellibrite LEDs, Pentair Racer cleaner, Pentair 320 chlorinator
    my build http://www.troublefreepool.com/threa...-north-Houston

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    Mod Squad tim5055's Avatar
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    Re: Mustard Algae ??

    Glad you figured it out!
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: Mustard Algae ??

    Anytime you have a lot of rain, it's a good idea to run a full battery of test to see where you stand so the pool doesn't get away from you.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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