Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 6 of 6

Thread: Foam and cloudy water in hot tub

  1. Back To Top    #1

    Join Date
    May 2013
    Location
    Essex County, NJ
    Posts
    19

    Foam and cloudy water in hot tub

    I'm having troubles getting and keeping my hot tub water clear since the spring. I typically replace the water and filter in the hot tub twice a year (May and Nov).

    I emptied the hot tub on 4 May, cleaned and rinsed the inside, blew as much of the water out of the pipes as I could with the exhaust side of a 6.5hp shop-vac and vacuumed up any water so the inside of the hot tub was dry. I replaced the filter and refilled with tap water and added chemicals. I use the chemicals recommended by the place I bought the hot tub (sodium dichlor 99% sanitizer by SpaGuard or BioGuard, Rendezvous Activate <Potassium Peroxymonosulfate 32.18%>, Rendezvous Protect Plus, and Rendezvous Natural Clear Enzyme Clarifyer). They recommend adding 4oz sodium dichlor once a week, 4oz Activate once a week, 2oz Protect Plus once a week, and 2T Natural Clear once a week, each chemical added on a different day. I still use these chemicals because I bought a lot of them over the winter before I found this site. I want to use these chemicals up before I switch to the BBB method recommended here.

    The hot tub water was fine for about 2 weeks. My 16 yo son and a bunch of his friends came over to use the pool and hot tub and 2 days later, the water in the hot tub was cloudy and foamy (water in pool was and continues to be fine). I used Foam Out and tried shocking the water but that didn't help. So I emptied the hot tub, cleaned everything out again, but did not replace the filter as it was only about 3 weeks old and cost $180 (I did remove the filter, rinse, and let dry outside the hot tub). Refilled with clean water and added chemicals. By the 2nd weekend in June and limited use, the water was cloudy and foamy again. I used Foam Out again to get rid of the foam and started using the Natural Clear stuff every day but if I missed a day, the cloudy water and foam came back.

    I'm not sure what's wrong with the water. The first bout of foam could have been residual laundry detergent in my son's friends swim suits though I thought replacing the water would clear that up. Some of the research I've done indicate this could be high TDS but I thought that was an issue that occurs over a long period of time. The water in the hot tub has only been in the tub for about 5 weeks now. The foam does leave a yellowish scum at the water line especially in the filter well; the scum cleans up relatively easily with a towel soaked in Natural Clear.
    Pool: 25k gal, IG Vinyl, built 2008, DE, Hayward Progrid 4820 - 96 GPM 48 sq ft filter area, 1.5hp Hayward Super Pump, 3/4hp Hayward booster pump 6060, Aquarite SWG T-Cell-90 Rev 1.40, Hayward Phantom, Hayward H350 heater.
    Hot Tub: 2008 Sundance Cameo, 450 gal

  2. Back To Top    #2
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,347

    Re: Foam and cloudy water in hot tub

    You may need to perform a decontamination procedure.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3

    Join Date
    May 2013
    Location
    Bay City, Michigan
    Posts
    283

    Re: Foam and cloudy water in hot tub

    Are you following their recommendations?
    450 gallons, 4 oz of dichlor per week, @ 5 weeks = 170 CYA
    Not to mention every 4 oz is raising your FC by 37

    No idea about those other chemicals and whats in them.

    I would think full test results and chlorine loss readings would be helpful.


    *EDIT* Another idea would be to drain and refill again, but this time try the Dichlor/bleach method only and see what happens. A test run to see how the water compares to the other way, and could tell if its all the stuff your adding or another issue.

    By that I mean use Dichlor until you added enough to reach a 30 CYA level then switch to only bleach/liquid chlorine.
    12500 gallons, 24 foot round above ground
    Hayward Sand filter, Pentair OptiFlo 1HP 2-Speed pump

  4. Back To Top    #4

    Join Date
    May 2013
    Location
    Bay City, Michigan
    Posts
    283

    Re: Foam and cloudy water in hot tub

    I'm thinking chemical overload. Like I said above test results would help too but just throwing some stuff out.

    Assuming your following their recommendations..

    Your dichlor is taking your CYA sky high as well as your FC levels and even crashing your ph levels by 1.4

    your Rendezvous Activate <Potassium Peroxymonosulfate 32.18%> Is also lowering your PH and TA. Regular use of it may be unnecessary unless you have steady high bather load, I know little about this stuff only what I read.
    If you find you're having trouble keeping FC in your tub during party's, and/or you smell a foul odor during your soaks, you can add Potassium Monopersulfate (MPS or Non-Chlorine Shock) before (and/or during) your soak to help the Chlorine Oxidize waste. The only thing I would say is, go easy with MPS. Use only the amount needed and not much more. It is acidic and will lower your TA/pH if you use a lot. Start out with 1-2 tbs in addition to your normal FC, and see if that cuts down on the FC usage. Up it to 3-4 tbs, or add another 1-2 tbs during the soak if needed. MPS will help oxidize waste. However, it will not kill bacteria, so you still need FC. Also, you can use MPS as a shock once a week to help oxidize leftover waste, and reduce Combined Chlorine (spent FC).
    Then you still have Rendezvous Protect Plus, and Rendezvous Natural Clear Enzyme Clarifyer) which I can't really say anything about cause I don't know enough. I did think the Rendezvous Protect Plus (Stain & Scale) was only necessary if you had well water or high metals.
    12500 gallons, 24 foot round above ground
    Hayward Sand filter, Pentair OptiFlo 1HP 2-Speed pump

  5. Back To Top    #5

    Join Date
    May 2013
    Location
    Essex County, NJ
    Posts
    19

    Re: Foam and cloudy water in hot tub

    Ok, thanks for info and ideas. Let me try some over next few days.
    Pool: 25k gal, IG Vinyl, built 2008, DE, Hayward Progrid 4820 - 96 GPM 48 sq ft filter area, 1.5hp Hayward Super Pump, 3/4hp Hayward booster pump 6060, Aquarite SWG T-Cell-90 Rev 1.40, Hayward Phantom, Hayward H350 heater.
    Hot Tub: 2008 Sundance Cameo, 450 gal

  6. Back To Top    #6

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

    Re: Foam and cloudy water in hot tub

    Overuse of some chemicals such as clarifiers can result in water getting cloudy. Perhaps the same is true for the de-foamer. Instead of using so much de-foamer, try raising the Calcium Hardness (CH) to 150 ppm for your next fill.
    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
  •