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Thread: cleaning up algae bloom

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    cleaning up algae bloom

    So was out for 3 days and returned to find pump not working and pool yellow/green/brown. So had the pump fixed, adjusted pH, brushed, and put in 5.5# hypochlorite.

    Three questions emerged.

    1) After one hour FC was 24 and CC zero. Why is CC zero?

    2) What is the max FC ok to swim in? (not that I will be swimming, just wondering)

    3) On this page it suggests to add DE to sand to speed up filtering. I asked the pump fix person who said since you have glass and no DE membrane, at the the next backwash your DE will be gone. You all agree?

    thank you
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

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    Mod Squad woodyp's Avatar
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    Re: cleaning up algae bloom

    CC is not always generated when killing algae. You can swim up to your shock level. We don't recomend using the DE trick until the end of the SLAM process to help filter any remaining bits.
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    Re: cleaning up algae bloom

    Quote Originally Posted by woodyp
    CC is not always generated when killing algae. You can swim up to your shock level. We don't recomend using the DE trick until the end of the SLAM process to help filter any remaining bits.
    1) would seem true, after 4hrs still have FC24 CC0 but...
    at the start was yellow/green/brown but somewhat translucent, could see bottom vaguely
    now is still yellow/green/brown but opaque
    hope that is progress

    2) Ok, thanks

    3) so do DE at the end but the DE will be removed at the next backwash?
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

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    Beens's Avatar
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    Re: cleaning up algae bloom

    Yes, DE gets flushed out when you backwash and you have to add it again if you still want it....
    (another tidbit from my limited experience)
    18' x 48" (42" water depth) Intex Metal Frame 6,700 Gallons
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    pwrstrk's Avatar
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    Re: cleaning up algae bloom

    Yes the DE will get back washed out.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: cleaning up algae bloom

    Quote Originally Posted by Beens
    Yes, DE gets flushed out when you backwash and you have to add it again if you still want it....
    (another tidbit from my limited experience)
    thank you
    perhaps that should be in the Pool School document (or did I miss it)

    so I suppose could also use the stuff that turns teeny things into less teeny things
    if so, is any one better than the others
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

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    pwrstrk's Avatar
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    Re: cleaning up algae bloom

    For this situation regular DE will work just fine. Usually comes in a 25# bag. Just don't breath it in, not good for ya,as it is the consentency of flour.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: cleaning up algae bloom

    Quote Originally Posted by pwrstrk
    For this situation regular DE will work just fine. Usually comes in a 25# bag. Just don't breath it in, not good for ya,as it is the consentency of flour.


    Sent from my iPhone using Tapatalk.
    so to get the last fine stuff is DE in the filter better than the products that assemble teeny things into clumps that are less teeny, like Super Blue
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

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    pwrstrk's Avatar
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    Re: cleaning up algae bloom

    Not sure what your talking about,assemble tiny things into clumps. Are you talking about floc ? The de will work fine.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    pwrstrk's Avatar
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    Re: cleaning up algae bloom

    Never heard of super blue.


    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    BoDarville's Avatar
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    Re: cleaning up algae bloom

    thank you
    perhaps that should be in the Pool School document (or did I miss it)
    Quote Originally Posted by engrav
    Beens wrote:
    Yes, DE gets flushed out when you backwash and you have to add it again if you still want it....
    (another tidbit from my limited experience)
    It's in there, albeit worded a bit differently
    Quote Originally Posted by Add DE to a Sand Filter - Pool School article
    Small amounts of DE can be added to a sand filter after each backwash to improve the filtering.
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    Re: cleaning up algae bloom

    Don't add clarifier or flocculant.... you probably won't need it...and they frown upon all those "extras" here. I'm sure someone with more knowledge than me will have some input on that.
    18' x 48" (42" water depth) Intex Metal Frame 6,700 Gallons
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    Re: cleaning up algae bloom

    Quote Originally Posted by Beens
    Don't add clarifier or flocculant.... you probably won't need it...and they frown upon all those "extras" here. I'm sure someone with more knowledge than me will have some input on that.
    Ok, no Super Blue, and don't need the DE now either as I am early in the slam

    will check FC CC again in a few hours

    I hope FC is still high, hard to find Ca hypochlorite on Whidbey Island

    I just noticed there are 217 users online. That is lots of people with troublefree pools.
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

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    Beens's Avatar
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    Re: cleaning up algae bloom

    I just use bleach....target has their brand on sale buy 3 get one free. 2.99 each.
    18' x 48" (42" water depth) Intex Metal Frame 6,700 Gallons
    Hayward Power-Flo LX 1.0 HP pump
    Hayward Pro Series S166T Sand Filter
    Original Intex Floating Skimmer

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    BoDarville's Avatar
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    Re: cleaning up algae bloom

    Clarifier & flocculant won't necessarily hurt anything. However they are nearly always a waste of time and money. The cloudiness after shocking (a.k.a., SLAMming) is the remnants of the now dead algae. It just takes time for it to get filtered out. You should see a noticeable improvement in clarity each day. Towards the end of the clearing process, the DE will help remove the remaining smaller particles more quickly. You could also use cellulose fiber (e.g., ZeoFiber or FiberClear) if you have concerns about using DE or your municipality forbids backwashing DE into the sewer system. Cellulose fiber is added to the filter in the same manner as DE. Like DE, it is removed during backwashing.
    Gold Supporter, TFP Lifetime Supporter, 26,680 gal Plaster IGP 3.5 - 10' depth / Attached Waterfall Spa, Manually Chlorinated, Triton Sand Filter, 1.5 HP * 1.1 SF = 1.65 SFHP 1-speed Pentair WhisperFlo WF-26 Pump, 400K BTU NG Teledyne Laars Series One Heater, Polaris 360, Test Kit Comparison, Chlorine/CYA Chart, SLAMing Your Pool, OCLT
    A good test kit is an investment, not an expense.

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    Re: cleaning up algae bloom

    episode is over, pool is clear, all is fine

    was clear in about 72 hours with slamming and glass filter

    what micron size does glass remove? I see various numbers on the web.

    thank you
    IG under fir trees and one cherry surrounded by grass built in 1979, 30k, plaster, old Sta-Rite HRPB30, 4.9 sq.ft, 20 GPM/sq.ft., but with new glass, new (in 2012) 1 HP WhisperFlo one speed, new (in 2013) Rainbow tab chlorinator attached at the top, old Maxi-Flo Heat Exchanger MF-260, Burnham V7 oil heater 245 MBH, new (in 2012) Compool to Easytouch, Taylor K-2005 and TF-100.

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