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Thread: New (to me) spa

  1. Back To Top    #1

    Join Date
    Apr 2016
    St. Louis, MO

    New (to me) spa

    First time spa owner here. Bought this house with a pool and a separate spa on Monday. I've been getting moved in and trying to get a handle on the pool chemistry, so I'm just now getting around to the spa. I tested the water this am with the TF-100, results are below.

    pH: 7.8
    FC: 1
    CC: .5
    CH: 125
    TA: 150
    CYA: 80

    So i assume I need to bring the pH down a bit, but what else do I need to do? The owners manual says that if I have an ozonator FC should be between 1 and 3. So am I good there? And there is a bucket of chemicals next to the spa with pH up, pH down, chlorine granules, algaecide, and a few others. Should I use these for now? Dump em?

    And finally, what do I need to do moving forward to take care of the spa? Change/clean filters? Set some kind of timer for the ozonator?
    30k free form IG gunnite pool with 1.5 hp challenger pump, sta-rite sand filter, SWG, and Rheem heater.

    2002 425 gal cal spa fiesta series spa with ozonator.

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Tucson, AZ

    Re: New (to me) spa

    I would not adjust the recommended FC levels due to the ozone.
    You need to follow the FC/CYA Chart so your FC is much too low for your CYA level (which is higher than you need, likely due to the granules).
    Jason, TFP Moderator
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  3. Back To Top    #3
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    DFW, TX

    Re: New (to me) spa

    PH up/down is fine. Skip the rest.

    This is how I have been maintaining my hot tub for a few years. It works great! How do I use Chlorine in my Spa (or pool)?
    TFP Moderator
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    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  4. Back To Top    #4
    Isaac-1's Avatar
    Join Date
    May 2010
    SW Louisiana

    Re: New (to me) spa

    I would also suggest now may be a good time to replace that water and get the CYA level down, I suspect the previous owner used dichlor exclusively.

    You may want to check out the dichlor then bleach method

    Dichlor - then bleach method


    ps how old is the ozonator, many types stop making Ozone after 3-4 years (some newer models may last 5-7 years) most also just have a power indicator light which does not tell you if they are producing ozone. There are one time (break glass draw tube) style testers for ozone, but given they cost around $15 each, and you can get a new Del brand ozonator off ebay for about $100, I question their value.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from
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