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Thread: What is causing this green sludge foam in hot tub?

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    caliskier's Avatar
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    What is causing this green sludge foam in hot tub?

    What is causing the foam? Foam by the wall is dark green

    image.jpg

    Seems to happen after backwash, but I just put in a lot of algicide
    Owner since August 2014. 21,500G Liner In ground Pool with attached 600G plaster in ground hottub. TF-100 Test Kit, Filter: Pentair TA60D Clearpro Sand (HTH) Filter. Pool: 1 Drain, 2 Skimmers 4 Returns. Hot Tub: 1 drain, 1 skimmer, 2 returns. Hot Tub/Pool run by Sta-Rite Dura Glas Single Speed 1.5hp P2RA5F-182L pump with Emerson K63CXESE4972 motor. Spa jets run by Sta-Rite Dura Glas H/L model number unknown.

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    Re: What is causing this green sludge foam in hot tub?

    What have you been putting in it?
    What type of algaecide?
    18,000 Gallon Aboveground. Sand Filter with 2HP 2 speed Pump.

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    Re: What is causing this green sludge foam in hot tub?

    SAMs club stuff, "pool brand"
    Owner since August 2014. 21,500G Liner In ground Pool with attached 600G plaster in ground hottub. TF-100 Test Kit, Filter: Pentair TA60D Clearpro Sand (HTH) Filter. Pool: 1 Drain, 2 Skimmers 4 Returns. Hot Tub: 1 drain, 1 skimmer, 2 returns. Hot Tub/Pool run by Sta-Rite Dura Glas Single Speed 1.5hp P2RA5F-182L pump with Emerson K63CXESE4972 motor. Spa jets run by Sta-Rite Dura Glas H/L model number unknown.

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    Re: What is causing this green sludge foam in hot tub?

    18,000 Gallon Aboveground. Sand Filter with 2HP 2 speed Pump.

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    caliskier's Avatar
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    Re: What is causing this green sludge foam in hot tub?

    Yes, that's it
    Owner since August 2014. 21,500G Liner In ground Pool with attached 600G plaster in ground hottub. TF-100 Test Kit, Filter: Pentair TA60D Clearpro Sand (HTH) Filter. Pool: 1 Drain, 2 Skimmers 4 Returns. Hot Tub: 1 drain, 1 skimmer, 2 returns. Hot Tub/Pool run by Sta-Rite Dura Glas Single Speed 1.5hp P2RA5F-182L pump with Emerson K63CXESE4972 motor. Spa jets run by Sta-Rite Dura Glas H/L model number unknown.

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    Re: What is causing this green sludge foam in hot tub?

    Alkyl (50% C14, 40% C12, 10% C16) Dimethyl Benzyl Ammonium Chloride is a quatanery algaecide and will foam. It is not recommended to use that type.

    It looks like you need to slam your hot tub. The chlorine will get rid of the foam (and the algeacide too). It will probably eat up your FC until its mostly gone.

    - - - Updated - - -

    The green you see in it is probably alge being killed.
    18,000 Gallon Aboveground. Sand Filter with 2HP 2 speed Pump.

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    Re: What is causing this green sludge foam in hot tub?

    Also that type of algaecide will likely leave a black residue behind that feels like grease.

    Here is the msds:
    http://www.kellysolutions.com/erenew...1_11_50_AM.pdf
    18,000 Gallon Aboveground. Sand Filter with 2HP 2 speed Pump.

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    Re: What is causing this green sludge foam in hot tub?

    Quote Originally Posted by easttn View Post
    Also that type of algaecide will likely leave a black residue behind that feels like grease.

    Here is the msds:
    http://www.kellysolutions.com/erenew...1_11_50_AM.pdf
    Wow, thanks, what should I be using?

    What is SLAM? Keep seeing that in other posts?
    Owner since August 2014. 21,500G Liner In ground Pool with attached 600G plaster in ground hottub. TF-100 Test Kit, Filter: Pentair TA60D Clearpro Sand (HTH) Filter. Pool: 1 Drain, 2 Skimmers 4 Returns. Hot Tub: 1 drain, 1 skimmer, 2 returns. Hot Tub/Pool run by Sta-Rite Dura Glas Single Speed 1.5hp P2RA5F-182L pump with Emerson K63CXESE4972 motor. Spa jets run by Sta-Rite Dura Glas H/L model number unknown.

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    Re: What is causing this green sludge foam in hot tub?

    Quote Originally Posted by caliskier View Post
    Wow, thanks, what should I be using?

    What is SLAM? Keep seeing that in other posts?
    Read this for recommendations on how to maintain a hot tub/spa with chlorine. Now, that is based on a stand alone spa. Maintained properly like a pool extra "stuff" is generally not needed.

    From the picture it appears to be in ground, but is that stand alone or connected to a pool? If it is connected to a pool you generally need to exchange water regularly so that the spa is maintained along with the pool.

    We do not "shock" our pools, we follow the SLAM Process when there is a problem. For a small spa like that I would just drain/refill it and start over rather than SLAMing. If it is connected to the pool and you have this problem in both places than a SLAM is in order.

    How much Pool School have you read? Start with these:
    ABCs of Water Chemistry
    Recommended Pool Chemicals
    How to Chlorinate Your Pool
    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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    caliskier's Avatar
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    Re: What is causing this green sludge foam in hot tub?

    Quote Originally Posted by tim5055 View Post
    Read this for recommendations on how to maintain a hot tub/spa with chlorine. Now, that is based on a stand alone spa. Maintained properly like a pool extra "stuff" is generally not needed.

    From the picture it appears to be in ground, but is that stand alone or connected to a pool? If it is connected to a pool you generally need to exchange water regularly so that the spa is maintained along with the pool.

    We do not "shock" our pools, we follow the SLAM Process when there is a problem. For a small spa like that I would just drain/refill it and start over rather than SLAMing. If it is connected to the pool and you have this problem in both places than a SLAM is in order.

    How much Pool School have you read? Start with these:
    ABCs of Water Chemistry
    Recommended Pool Chemicals
    How to Chlorinate Your Pool
    Thanks, I will look into these, it is a spa / pool combo, it is not clear from the picture.
    Owner since August 2014. 21,500G Liner In ground Pool with attached 600G plaster in ground hottub. TF-100 Test Kit, Filter: Pentair TA60D Clearpro Sand (HTH) Filter. Pool: 1 Drain, 2 Skimmers 4 Returns. Hot Tub: 1 drain, 1 skimmer, 2 returns. Hot Tub/Pool run by Sta-Rite Dura Glas Single Speed 1.5hp P2RA5F-182L pump with Emerson K63CXESE4972 motor. Spa jets run by Sta-Rite Dura Glas H/L model number unknown.

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    Re: What is causing this green sludge foam in hot tub?

    I've only had green hot tub water after going away for a couple days and not adding bleach. The foam usually for me is the women's residual shampoo left in there hair also clothes detergent left over in the shorts

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