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Thread: pool closed for winter - spa stays open - recommended ranges

  1. Back To Top    #1

    Join Date
    Sep 2015
    Chicago area, IL

    pool closed for winter - spa stays open - recommended ranges

    Quick question: my in-ground pool (plaster) is closed for the winter, and the spa stays open. During the season, they share water via a spillover. For the winter with spa only, I am wondering whether I should shift to suggested ranges for spas in the pool calculator, or stay with the recommended ranges? Of note, the CH recommendation is lower if I shift to spa.

    FC 5
    pH 7.6
    TA 100
    CH 180
    CYA 26

    Should I leave CH at 180? I appreciate all the info available on this site. thanks in advance!
    17000 gal in-ground plaster 20 y.o. pool/spa with spillover - Sta Rite Cartridge filter - Legacy LRZ 325 heater - Polaris Vac-Sweep 380

  2. Back To Top    #2
    Mod Squad
    Join Date
    Aug 2012
    DFW, TX

    Re: pool closed for winter - spa stays open - recommended ranges

    Yes, I would try to mostly switch over to spa numbers. Here is what I do with mine, 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

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