Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 10 of 10

Thread: pH troubles...

  1. Back To Top    #1

    Join Date
    May 2015
    Location
    TN
    Posts
    295

    pH troubles...

    My FC level was 1.5 and when I done my pH test it turned purple... Two days before pH was in normal range. This was right before I added 4 lbs of stabilizer (new fill after liner replacement) and liquid chlorine (it is now way cheaper than 8.5% bleach at Walmart!). What has caused my pH to change so fast?
    24k gal. In-ground, vinyl. 2005 build
    Hayward Pro-Series S244T sand filter system
    Hayward motor & pump (rpm 3450,model SP2607X10)
    Polaris 280 w/booster pump.Taylor K-2006 test kit

  2. Back To Top    #2
    mikemass's Avatar
    Join Date
    Jul 2013
    Location
    Northern Howell, NJ
    Posts
    484

    Re: pH troubles...

    Aeration? SWG? If neither, then what else have you added? Is your TA high?
    25 + year pool owner. Current pool (going on 11th year) - 38K gallon in ground Gunite/White Plaster, Spillover Spa, Hayward Cartridge Filter, Hayward 450k BTU NG Heater, Hayward Goldline Aqua Logic control with T-Cell-15 Salt Water Cell, Dolphin Explorer.
    You Need: Bleach, a A Test Kit & a Bookmark to "Pool School". Now what's your question?

  3. Back To Top    #3

    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Location
    Greenville, SC
    Posts
    1,798

    Re: pH troubles...

    Do you have any water features like a waterfall? Lots of splashy kids?

    In the end it really doesn't matter, it needs to come down to the 7s to be safe to swim and for equipment. Target for 7.7 so if you overshoot it's not a big deal. Baby steps for pH adjustment.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  4. Back To Top    #4

    Join Date
    May 2015
    Location
    TN
    Posts
    295

    Re: pH troubles...

    Well, false alarm guys. I must have had a mis whack testing yesterday because it is a beautiful 7.4 this morning. My 3 yo toddler was helping me. Lol. I may have misadded something testing.

    My numbers:
    FC 4.5
    pH 7.4
    CYA 70
    TA 60
    CH 30 (isnt this ok for vinyl?)

    I am seeing a tad bit of cloudiness in the deep end... Any help on how to resolve that?
    24k gal. In-ground, vinyl. 2005 build
    Hayward Pro-Series S244T sand filter system
    Hayward motor & pump (rpm 3450,model SP2607X10)
    Polaris 280 w/booster pump.Taylor K-2006 test kit

  5. Back To Top    #5
    mikemass's Avatar
    Join Date
    Jul 2013
    Location
    Northern Howell, NJ
    Posts
    484

    Re: pH troubles...

    Numbers looks great. Do you have any CC's?
    25 + year pool owner. Current pool (going on 11th year) - 38K gallon in ground Gunite/White Plaster, Spillover Spa, Hayward Cartridge Filter, Hayward 450k BTU NG Heater, Hayward Goldline Aqua Logic control with T-Cell-15 Salt Water Cell, Dolphin Explorer.
    You Need: Bleach, a A Test Kit & a Bookmark to "Pool School". Now what's your question?

  6. Back To Top    #6

    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Location
    Greenville, SC
    Posts
    1,798

    Re: pH troubles...

    The minimum FC for CYA 70 is 5. You should get it to target now. Pool School - Chlorine / CYA Chart

    I would bring it up to ~10 as the sun is going down and do an OCLT. If you don't pass, it's slam time.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  7. Back To Top    #7

    Join Date
    May 2015
    Location
    TN
    Posts
    295

    Re: pH troubles...

    Already done CC is 0 Mike
    24k gal. In-ground, vinyl. 2005 build
    Hayward Pro-Series S244T sand filter system
    Hayward motor & pump (rpm 3450,model SP2607X10)
    Polaris 280 w/booster pump.Taylor K-2006 test kit

  8. Back To Top    #8
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: pH troubles...

    Yes, that CH is fine for a vinyl pool.

    Jumping on chlorine soapbox
    It is very important to maintain FC above minimum level for your CYA level at all times, FC/CYA Chart. When FC drops below minimum the pool becomes unsanitary because the pathogen, bacteria and virus kill rate is too low to effectively prevent person to person disease transmission, especially in kids. Keeping FC above min also prevents algae, but chorine's #1 job is to sanitize the pool.
    Off box

    Spent some time at the TX coast last weekend that has numerous cases reported of flesh eating bacteria, as well as other stories of ear aches and other problems. Chlorine is your friend.
    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

  9. Back To Top    #9

    Join Date
    May 2015
    Location
    TN
    Posts
    295

    Re: pH troubles...

    I am so tickled to have a CYA of 70 If you guys remember I was one of the ones with a CYA over 200...
    24k gal. In-ground, vinyl. 2005 build
    Hayward Pro-Series S244T sand filter system
    Hayward motor & pump (rpm 3450,model SP2607X10)
    Polaris 280 w/booster pump.Taylor K-2006 test kit

  10. Back To Top    #10

    Join Date
    Oct 2013
    Location
    Iowa
    Posts
    76

    Re: pH troubles...

    FYI I've had the same thing happen on my pH test once, looked like sudden unexplained pH rise out of range, but next morning pH was lower than normal (I added some acid without thinking to question the test first, luckily I did take the baby step approach and didn't knock it too low!). I am also using a K-2006. I had to investigate what happened and figured it out. If you do not fully rinse the vial between the chlorine test and the pH test, you get funky colors in the pH test making it look really high. I now rinse multiple times just to be sure.

    Agree with others your cloudiness is because your chlorine got too low, you need to keep above minimum to avoid, and probably SLAM to get clear it up now. I failed and let my chlorine get too low a couple of weeks ago, I thought I was OK because water was still clear so I just bumped back into normal range and continued as normal. Two days later I found green stuff growing out of my pool light! Once that was all brushed the pool was quite cloudy (looked like a hotel pool!) My first SLAM (We've only owned the pool for 3 and my first opening wasn't a proper SLAM) went fast but I wasn't out of range for CL for more than 2 or 3 days at most either.
    20,000gal in-ground 16x36 sentry pools vinyl liner, Pentair sand filter, Pentair minimax NT heater, auto-cover, Polaris 280 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
  •