Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 3 of 3

Thread: Strong smell and burning eyes when air blower is on.

  1. Back To Top    #1

    Join Date
    Jul 2015
    Location
    Katy, TX
    Posts
    147

    Strong smell and burning eyes when air blower is on.

    Hi guys,

    Attached spa/pool with spillover. We've noticed a strong chlorine smell and burning eyes when the air blower is on in the spa. My eyes are rather sensitive so it could just be that, but it seems odd. The eye thing is not from the actual water, but the air coming up around us from the blowers.

    Water is crystal clear, but I always test the pool water and not the spa. You know what? I'm going to run a full battery on both bodies of water and report back.

    Brb.


    15k gal IG plaster w/ water feature; 600 gal spa w/ spillway; Pentair VS+SVRS Pump; Pentair FNS Plus DE Filter; Pentair MiniMax NT Heater; Rainbow Lifegard 320 In-Line Feeder (no idea what this does or how it works); Polaris 3900 Sport Cleaner (constantly on its side); Compool Lx3800 Control System; TFT-100 test kit.

  2. Back To Top    #2

    Join Date
    Jul 2015
    Location
    Katy, TX
    Posts
    147

    Re: Strong smell and burning eyes when air blower is on.

    Tests are almost identical.

    FC 7
    CC < .5 (pool was 0)
    pH 7.5+
    TA 70
    CH 300 (pool 275)
    CYA 50


    15k gal IG plaster w/ water feature; 600 gal spa w/ spillway; Pentair VS+SVRS Pump; Pentair FNS Plus DE Filter; Pentair MiniMax NT Heater; Rainbow Lifegard 320 In-Line Feeder (no idea what this does or how it works); Polaris 3900 Sport Cleaner (constantly on its side); Compool Lx3800 Control System; TFT-100 test kit.

  3. Back To Top    #3

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

    Re: Strong smell and burning eyes when air blower is on.

    A spa's hotter water and aeration from spa jets volatilizes a lot more chlorine that gets into the air. Also, the higher temperature has the active chlorine level be higher at the same FC/CYA ratio -- it's about 3.8 times higher at 104F than at 80F. Also, a spa has higher bather load so can have more chloramines and some are volatile and irritating even at 0.02 ppm which won't be measured as CC.

    Ideally in a spa that is separate one would start a soak with around 1-2 ppm FC ad 30-40 ppm CYA and would add chlorine after the soak. The most smelly, volatile, and irritating compounds would then be generated after the soak and can be outgassed with the cover off either after the soak or before the next soak. Unfortunately with your spa connected to the pool you don't have that option. Probably the best thing to do is to aerate the water in the spa (i.e. run the jets) for a short time before you are going in to use the spa. That may help remove volatile chemicals that may be irritating.

    Another option is to lower the chlorine level before you get into the spa and this is most easily done using hydrogen peroxide where the same volume of 3% hydrogen peroxide is equivalent to getting rid of the same volume of 6% bleach (so you can use PoolMath with 6% bleach to figure out how much hydrogen peroxide to add to the spa). This way you can get down to 2 ppm FC. Since the spa water volume is small, this shouldn't affect your overall chemistry once you go back to exchanging water between the spa and the pool (I presume you do that after your soak).

    I'm assuming that this problem is related to some volatile chemicals from the water. It may instead be something else going on with the blower. See if you experience the same problem if you just run the spa jets to aerate the water (i.e. see if you can smell or get irritation from what is outgassed). If that doesn't bother you, then there may be something growing in the blower since it has moist air so could be biofilms or mold or something like that.
    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"

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •