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Thread: More newbie questions

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    Join Date
    May 2013
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    Virginia
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    More newbie questions

    How do you know if biofilms have formed? We're in the process of cleaning and setting up a neglected hot tub. I plan on using a decontam product plus a super shock afterward to be on the safe side (the hot tub was NASTY when we moved in). I'd like to know for future reference if there's a way you can tell if biofilms have formed.

    And another probably silly question - as with using the BBB method for maintaining a pool, I can use household/hardware store products on my hot tub (de-icer, muriatic acid, etc)?

    Eta - thought of another question: is it possible to "cheat" by bringing up the FC to a slightly higher level, say 8-10 after use, thereby reducing the need to dose to 2-3x a week. I anticipate we'd (husband and myself, on occasion our 3 kids) use the tub about twice a week.
    10,000 gallon inground, gunite, 500lb sand filter. Brand new to this pool thing.

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    linen's Avatar
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    Jul 2010
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    Twin Cities, MN
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    Re: More newbie questions

    It is hard to tell when biofilms form inside plumbing. One indicator for fairly fresh (or new) water on a heated hot tub is that it should not lose more than 25% FC in a day.

    Basically you use the same products as you do in your pool, except that for chlorine tubs, we recommend starting with dichlor then moving to bleach. Read this post here: http://www.troublefreepool.com/how-d...95.html#p80503 In that post there is also a link to a good decontamination process.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  3. Back To Top    #3

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    Virginia
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    Re: More newbie questions

    Thank you!! I have read and will continue to reread that thread, lots of great info to absorb.
    10,000 gallon inground, gunite, 500lb sand filter. Brand new to this pool thing.

  4. Back To Top    #4

    Join Date
    Mar 2007
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    San Rafael, CA USA
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    Re: More newbie questions

    If your spa does not have an ozonator, then dosing after your soak should carry you through the middle of the week if you add enough. With an ozonator, it will be more difficult because ozone reacts with chlorine so you could have a 50% or higher daily chlorine loss in between soaks. For sure with an ozonator you wouldn't make it for a week, but twice a week is possible but on the edge. Just see how it goes.

    For spa decontamination, use either Spa System Flush or Ahh-Some.
    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"

  5. Back To Top    #5

    Join Date
    May 2013
    Location
    Virginia
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    Re: More newbie questions

    Thank you! Putting those on my list.

    No, no ozonator. Plan on testing reguarly the first few weeks, then once I get a feel for the chlorine consumption, I hope to be able to dose just 2-3 times a week.
    10,000 gallon inground, gunite, 500lb sand filter. Brand new to this pool thing.

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