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Thread: spa oxidizing shock

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    Join Date
    Jun 2014
    Houston, Texas

    spa oxidizing shock

    Hi. What do y'all use to put in your hot tub after you get out? we have been using Leslie's Fresh N Clear spa oxidizing shock, fast acting and chlorine free. Is there anything better and that comes in a larger size than what they have? Of course better price is good too! TIA
    19k SW IG
    Wet Edge pebble tech = new 5/16 (replaster)
    Hayward variable speed pump (new 6/17) /Shark for cleaning
    New - filled 10/18/14 - TFP 100 test kit

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    TFP Guide

    pabeader's Avatar
    Join Date
    May 2015
    Cartersville Ga

    Re: spa oxidizing shock

    For spa care I would suggest reading this: How do I use Chlorine in my Spa (or pool)?
    It provides a path for clean, safe spa care.
    Bob - INTEX 12x24 owner (not setup yet), 'New to me' Kreepy Krauly Sand Shark, Test kit: TF-100 w/Speed Stir

  3. Back To Top    #3

    Join Date
    Feb 2017
    Dahlonega, Georgia

    Re: spa oxidizing shock

    You didn't say if you are sanitizing with bromine or chlorine. Fresh n clear is potassium peoxymonosulfate, also referred to as monopersulfate, or MPS. I have a bromine spa, and was using MPS as the after soak oxidizer, but it's a little pricey. I switched over to using Walmart brand 8.25% bleach as the after soak oxidizer, and it works just fine. I have a bromide bank of at least 30 ppm in my spa, so the bleach converts the sodium bromide to hypobromous acid, the active sanitizer. This reaction happens quite quickly, usually in a manner of a few minutes, so the bleach does not usually oxidize the bather waste directly, but the formed hypobromous acid does. Needless to say, while bleach works as well as MPS, or maybe even better, it is quite a bit more economical to use.
    Coleman Lay-Z-Spa inflatable spa (by Bestway), 210-230 gal, installed in garage, currently using the dichlor/bleach method, custom test kit which is essentially a Taylor K-2006 with Taylor K-1004 comparator block for pH, Speed Stir

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