Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 4 of 4

Thread: New Spa, Foaming, Borates

  1. Back To Top    #1

    Join Date
    May 2015
    Reading, PA

    New Spa, Foaming, Borates


    I have a new spa. 300 gallons. I'm sanitizing with bleach, per the instructions in the sticky. About a week and a half in and the water chemistry remains stable. CH is 150, pH is 7.5, TA is 65. The spa is indoors and covered. I haven't concerned myself with CYA under these circumstances, since it sees so little sunlight, none directly. Should I still bring up the CYA?

    I am getting a fair amount of foam when the air is on, and a bit of a "new spa" plastic-y smell. Is that to be expected? Does it decrease over time? Is there anything I can add to help with the foaming?

    I'd like to add borates, as long as it doesn't add to the foaming issue. I'm hoping that will help even out the highs and lows of the sanitizer. But maybe I just need to add CYA... Poolmath indicates 18 oz of 20 mule team, plus 8 fl oz of muriatic acid should get it to 50 ppm. Are these gradual additions, or just dump it all in and mix it up? (I don't add borates to my pool, so I have no experience with the process.) I'm also a little concerned because that seems like a lot of stuff (acid, particularly) to add to this small volume of water.

    In short, CYA? Borates? Both? Do those calculations look ok?

    Thank you in advance! This forum has been a great resource for my pool. I'm hoping it makes spa care just as simple.
    AG 28700 gal (21x41 oval 4-6 feet deep)
    Pentair Warrior 88 DE filter/Hayward 1.5hp 2-speed pump
    Testing w TF-100

  2. Back To Top    #2
    dsmith99's Avatar
    Join Date
    Jun 2016
    SW, Iowa

    Re: New Spa, Foaming, Borates

    Even with a new spa it's still a good idea to purge the plumbing with Ahh-Some and make sure everything is good and clean. There may have been some residual stuff in the pipes that might be giving you some problems. You could also raise CH, that may help with the foaming.

    Another common cause for foaming is soap not getting thoroughly rinsed from suits or skin, hair care products, cosmetics, deodorant and such. We have swimwear that we use only in the hot tub and it gets hung up to dry and we never run it through the laundry. A quick hop in the shower before use can keep a lot of these contaminants out of your tub.

    You definitely want some CYA in the tub, that will help to buffer the harshness chlorine. Even though is usually covered, my tub does not seem to hold FC as well if CYA gets low. I keep CYA in my tub at about 40ppm and I have seen it fall off, even though I rarely add water. I check it every couple weeks, if I notice it getting low I just use dichlor for a day or two to bring it back up.

    Adding borates is much easier if you just get some granular boric acid. Adding this way does not cause a rise in PH so it doesn't require acid to counteract. Cost difference is minimal in a hot tub but for my pool it was not only way easier but about $30 cheaper and I had several pounds left over.
    AGP 24' x 54" approx 14000 gal Full sun all day, Hayward 1.5 HP and EC50 D.E. filter
    Stenner 45MPHP10 10 gal/day fixed rate with intermatic ET1125C timer
    Dolphin E10 robotic cleaner, 330 gallon Tiger River Spa, Taylor K-2006C test kit

  3. Back To Top    #3

    Re: New Spa, Foaming, Borates

    I personally wouldn't add that much acid all at once... I'd add the borax, test pH, verify if it's off the chart, and add the acid in 2-4 doses, measuring in between. With jets on high, a hot tub mixes pretty quickly so it doesn't take that long.
    18000 gallon plaster pool, Pentair Triton II sand filter, Purex Triton Minimax Plus 300 gas heater, 1.0 HP two-speed Pentair Superflo, Polaris 380
    Caldera Marino hot tub, 360 gallon

  4. Back To Top    #4
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    DFW, TX

    Re: New Spa, Foaming, Borates

    CYA will decay at a rate of around 5ppm per month in a hot tub.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    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

Posting Permissions

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