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

Thread: High FC and High pH

  1. Back To Top    #1

    Join Date
    Aug 2012
    Location
    Houston, TX
    Posts
    796

    High FC and High pH

    Hello to all,

    We've been getting some kind of particles in the SPA via the blower. Now have been running in SPA mode for 10 min's 3-4 days per week, w BLOWER too for 1-2 min's. The SPA spills over into POOL when main VSP is on daily.

    The pool guy came [we are now using liquid bleach bc I wanted to get rid of pucks due to their infamous higher CYA levels] and applied some more liq bleach [12.5%] and I think he ran some in the blower to disinfect it. Well, I did the quick FC & pH test and the FC was orange and off the charts The pH was at the top or 7.8-8.2 range. When I test the FC & CC via TF-100, I used 34 drops to clear the water, so that's an of 17.

    I did not perform any other tests, but I am filling the pool w about another inch of water to the drain line. It is not sunny now and the CYA was last tested at 55-60 about a week ago. I am wanting to know what I need to do or not do at this point? Also, it is ok to use the SPA tonight or are the FC levels way too high?

    Thank you,
    tstex
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill

  2. Back To Top    #2
    robdac's Avatar
    Join Date
    Jun 2014
    Location
    Weston, FL
    Posts
    232

    Re: High FC and High pH

    If the pool guy is coming once a week he has to put enough chlorine in the pool that it still has a minimum level left when he comes back the following week. A FC of 17 seems pretty reasonable to me since he's not adding any for a week.
    11K gal IG screened-in plaster pool w/ spa
    pentair 150 cartridge filter, Pentair Intelliflow VS pump,
    Aquarite AQR15 SWG, AquaCal Heatwave Heat Pump, TF-100 test kit

  3. Back To Top    #3

    Join Date
    Aug 2012
    Location
    Houston, TX
    Posts
    796

    Re: High FC and High pH

    The last time he was here he was supposed to leave me some CL, but did not. This time he did, so I will add when need. I bought M-Acid [30%] and will adjust when needed. After I get this down, we agreed I would start maintaining pool and when we left for vacation or extended periods, I would pay him on a per trip basis. He's really a good guy, been servicing pools for 28 yrs and was recommended by a good friend. Her husband died and he used to take care of the pool, so they hired this guy and we have used him too.

    Thanks, tstex
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill

  4. Back To Top    #4
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Columbia, SC
    Posts
    8,499

    Re: High FC and High pH

    With your FC at 17 the pH test is inaccurate, reading high. This occurs when the FC goes above 10.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

  5. Back To Top    #5

    Join Date
    Aug 2012
    Location
    Houston, TX
    Posts
    796

    Re: High FC and High pH

    Quote Originally Posted by tim5055 View Post
    With your FC at 17 the pH test is inaccurate, reading high. This occurs when the FC goes above 10.
    Perfect, this is what I needed to know. How long, typically, does it take for the pool's FC to lower? Water temp goes from 69-73 now, CYA 55-60 and sun is in and out now for the next 3-5 days. No activity in the water and no leaves or anything of substance in the water. Thanks again.
    InGround 15K gal, 18'x30' 3.5' to 5.5' depth w/ 9'x9' spillover Spa, Pebblesheen w/ Travertine, Hayward 3 HP VSP, Hayward C4030 Cartridge, Hayward 1.5 HP for 2 Scupper columns, ProLogic, PL-PS-8 Panel, Hayward 400K BTU Heater, 3 ColorLogic LED, Spa Blower, TF-100 w S-Stick, QC Tiger Shark, Autofill

  6. Back To Top    #6

    High FC and High pH

    Obviously it will vary by pool. My pool consumes about 2ppm/day during summer and probably a little less than 1ppm/day during the winter. I'm in Southern California and have a 14,000 gal pool. CYA is about 40.


    14,000 Gal IG Pool/500 Gal Attached Spa
    Pentair Whisperflow 1hp Single Speed Pump
    Sta-Rite Posi-Flo PTM-135 Cartridge Filter
    Hayward H400 Natural Gas Heater

Posting Permissions

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