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Thread: Slamming Hot Tub

  1. Back To Top    #1

    Join Date
    May 2014
    Location
    NJ
    Posts
    14

    Question Slamming Hot Tub

    I have had tremendous success with the TFP method for my pool this year and was ready to convert my spa to this method. Its been a few weeks now and its been pretty good. I noticed it dropping at least 4ppm from say 8pm to 5pm the next day with no bathers. The test results are;
    FC-4
    CC-1-1.5
    PH-7.2
    TA-60
    CH-120
    CYA-35
    Temp-98'
    275 gal
    I've brought the FC to 20 and recheck every two hrs or so and it falls to 15. The CC stays about 1-1.5
    I'm planning to keep slamming unit it passes the CC test with .5 or less.
    My question is then what about the overnight FC loss test. Should it still lose less than 1ppm or does the higher temp change that rule?
    Also, the water looks crystal clear with not much of a chlorine smell.
    Tredd23-Central NJ
    In-Ground-20x12 Vinyl liner (7600gal)/1.5hp Super pump/300# Sand filter (oversized I know)/In-line chlorinator (I use 3' pucks)only to maintain CYA/150K BTU Hayward gas heater/Water temp maintained at 85/Clear 16mil solar blanket/Taylor 2006 test kit
    Vita Joli spa 250gal/cartridge filters w/ozonator

  2. Back To Top    #2

    Join Date
    May 2014
    Location
    NJ
    Posts
    14

    Re: Slamming Hot Tub

    Is shocking or slamming the same method for both pool and spa? (FC overnight loss < 1, CC .5 or<, and water clarity)
    Tredd23-Central NJ
    In-Ground-20x12 Vinyl liner (7600gal)/1.5hp Super pump/300# Sand filter (oversized I know)/In-line chlorinator (I use 3' pucks)only to maintain CYA/150K BTU Hayward gas heater/Water temp maintained at 85/Clear 16mil solar blanket/Taylor 2006 test kit
    Vita Joli spa 250gal/cartridge filters w/ozonator

  3. Back To Top    #3

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,082

    Re: Slamming Hot Tub

    Do you have an ozonator? With a covered spa or one not exposed to sunlight, you look at the 24 hour loss. With no ozonator, it's usually around 15-25% loss, but with an ozonator it can be 50% or more. This is because ozone reacts with chlorine. So an ozonator works well if you use the spa regularly since it oxidizes bather waste so you'd use less chlorine, but in between soaks if you don't use the spa every day or two, the chlorine loss will be higher.

    On the other hand, with ozone you usually don't see such a high CC. CC is normal in the hours after a soak, but just before your next soak it shouldn't be that high. You can try doing a SLAM and yes the levels are the same as for a pool.

    If you have never decontaminated your spa, then the high chlorine demand and even the CC might be from that. If that is the case, you can use Ahh-Some to remove greases, oils, and biofilm.
    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"

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