Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 29

Thread: HIGH FC Reading!

  1. Back To Top    #1

    Join Date
    Jul 2015
    Location
    Greenville, SC
    Posts
    19

    HIGH FC Reading!

    I'm panicking a little ...

    Here are my current test results.
    *using TF-100 test kit*

    pH 7.5
    TA 60
    FC 18 *** tested twice!!!!***
    CC 0
    TC 18 ***
    CYA 50
    CH 225

    My SWG was at 68% .. I immediately reduced to 40% after this reading.

    Should I do anything else immediately?!?!?
    16x36 IG Vinyl (25k gallons), Pentair Sand Dollar Filter SD60, Intellichlor IC40 SWG, Intelliflo Superflo VS Pump, Polaris 360 Cleaner

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: HIGH FC Reading!

    Nope. That is still below shock level and safe to swim in.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  3. Back To Top    #3
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: HIGH FC Reading!

    It is safe to swim when FC is between minimum level and shock level for your CYA level. Chlorine CYA Chart
    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

  4. Back To Top    #4

    Join Date
    Jul 2015
    Location
    Greenville, SC
    Posts
    19

    Re: HIGH FC Reading!

    Ok .. So adjusting the SWG should do the trick? We've even had lots of rain and its jumped from 11-18 in 5 days.

    Quote Originally Posted by jblizzle View Post
    Nope. That is still below shock level and safe to swim in.

  5. Back To Top    #5
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    11,620

    Re: HIGH FC Reading!

    Since you're running an SWG, your CYA should be higher, it should be closer to 70ppm. Don't worry about the FC, it will come down on its own and your level is not that high.

    However, I wouldn't put too much stock in your pH measurement. At an FC higher than 10ppm, the pH indicator dye is not accurate. Retest your levels when your FC drops below 10ppm.


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  6. Back To Top    #6

    Join Date
    Jul 2015
    Location
    Greenville, SC
    Posts
    19

    Re: HIGH FC Reading!

    Thank you!!!


    Quote Originally Posted by pooldv View Post
    It is safe to swim when FC is between minimum level and shock level for your CYA level. Chlorine CYA Chart

  7. Back To Top    #7

    Join Date
    Jul 2015
    Location
    Greenville, SC
    Posts
    19

    Re: HIGH FC Reading!

    I agree with the CYA reading. Thanks for the help!!!


    Quote Originally Posted by JoyfulNoise View Post
    Since you're running an SWG, your CYA should be higher, it should be closer to 70ppm. Don't worry about the FC, it will come down on its own and your level is not that high.

    However, I wouldn't put too much stock in your pH measurement. At an FC higher than 10ppm, the pH indicator dye is not accurate. Retest your levels when your FC drops below 10ppm.


    Sent from my iPhone using Tapatalk

  8. Back To Top    #8

    Join Date
    Jul 2015
    Location
    Greenville, SC
    Posts
    19

    Re: HIGH FC Reading!

    8/11/15 reading :
    *only tested chlorine*
    FC 14
    CC .5
    TC 14.5

    8/13/15 reading :
    pH (didn't test)
    TA 60
    FC 12
    CC .5
    TC 12.5
    CYA 40
    CH 200

    8/16/15 reading :
    pH 7.5 (possibly inaccurate b/c of high FC reading)
    TA 60
    FC 14
    CC 0
    TC 14
    CYA 50
    CH 225

    SWG has been at 40% since 8/9/15. Why is FC jumping back up? Should I lower SWG more? I'm so new at this and I know I ask basic questions. I have read information on Pool School. I know what readings SHOULD be, but I don't know how to make them get to those ideal readings. Help would be greatly appreciated!

  9. Back To Top    #9
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    11,620

    Re: HIGH FC Reading!

    What is the volume of your pool?

    What model intellichlor do you have (IC-20, -40, or -60)?


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  10. Back To Top    #10
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: HIGH FC Reading!

    Quote Originally Posted by khsjes27 View Post
    8/11/15 reading :
    *only tested chlorine*
    FC 14
    CC .5
    TC 14.5

    8/13/15 reading :
    pH (didn't test)
    TA 60
    FC 12
    CC .5
    TC 12.5
    CYA 40
    CH 200

    8/16/15 reading :
    pH 7.5 (possibly inaccurate b/c of high FC reading)
    TA 60
    FC 14
    CC 0
    TC 14
    CYA 50
    CH 225

    SWG has been at 40% since 8/9/15. Why is FC jumping back up? Should I lower SWG more? I'm so new at this and I know I ask basic questions. I have read information on Pool School. I know what readings SHOULD be, but I don't know how to make them get to those ideal readings. Help would be greatly appreciated!
    If you added CYA- and it looks like it since it went up - that would account for the FC sticking around longer and building up.

    Just reduce the filter time or the SWG on time. Personally, I'd start by cutting the filter down an hour, because that will save a lot more money on electricity than just reducing the SWG on time. The SWG percentage is just like the power level on the microwave. 50% means on half the time, off half the time. 40% means on 40% of the time. But it will only run when it has flow, which means the pump has to be on. If you're running 8 hours pump at 40% SWG, that's the same as 4 hours pump at 80% SWG or some multiple thereof.

    The pool is still swimmable, so don't get so anxious. It's all about learning your pool's personality. You only joined TFP last month! You're doing great! Another couple of weeks of experimenting and you'll be bored with pool maintenance and will start trawling the forum looking for someone else's problem to solve.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  11. Back To Top    #11

    Join Date
    Jul 2015
    Location
    Greenville, SC
    Posts
    19

    Re: HIGH FC Reading!

    It is an IC40. I have a 16x36 rectangle. I still can't figure out exact volume. I'm thinking 25,000. We have a 3.5ft shallow end that goes to 8ft deep end.

    Quote Originally Posted by JoyfulNoise View Post
    What is the volume of your pool?

    What model intellichlor do you have (IC-20, -40, or -60)?


    Sent from my iPhone using Tapatalk

  12. Back To Top    #12
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: HIGH FC Reading!

    Please add your pool info to your signature as shown here, Pool School - Read This BEFORE You Post
    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

  13. Back To Top    #13
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    11,620

    Re: HIGH FC Reading!

    Quote Originally Posted by khsjes27 View Post
    It is an IC40. I have a 16x36 rectangle. I still can't figure out exact volume. I'm thinking 25,000. We have a 3.5ft shallow end that goes to 8ft deep end.
    24,800 gallons by PoolMath....call it 25,000.

    Do as Richard320 says. Start cutting back your pump run time by an hour. Wait a few days. Check your FC. If it is not low enough, cut out another hour. Repeat as needed.


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  14. Back To Top    #14

    Join Date
    Jul 2015
    Location
    Greenville, SC
    Posts
    19

    Re: HIGH FC Reading!

    It's almost like you know me!! (The anxious part describes me perfectly!) 😁

    I did add stabilizer because I felt it needed to be higher and so did another user in this thread

    We run the pump at high speed from 3-11 each day .. so I think you might have just helped with the issue tremendously. 8 hours high speed at 40% is like 4 hours at 80% ... which is exactly what we were doing!

    I can't wait till I can start trolling the forum and help newbies like me!! Might be a while though -- maybe next season!

    Thank you!!


    Quote Originally Posted by Richard320 View Post
    If you added CYA- and it looks like it since it went up - that would account for the FC sticking around longer and building up.

    Just reduce the filter time or the SWG on time. Personally, I'd start by cutting the filter down an hour, because that will save a lot more money on electricity than just reducing the SWG on time. The SWG percentage is just like the power level on the microwave. 50% means on half the time, off half the time. 40% means on 40% of the time. But it will only run when it has flow, which means the pump has to be on. If you're running 8 hours pump at 40% SWG, that's the same as 4 hours pump at 80% SWG or some multiple thereof.

    The pool is still swimmable, so don't get so anxious. It's all about learning your pool's personality. You only joined TFP last month! You're doing great! Another couple of weeks of experimenting and you'll be bored with pool maintenance and will start trawling the forum looking for someone else's problem to solve.
    - - - Updated - - -

    Thank you!!!!


    Quote Originally Posted by JoyfulNoise View Post
    24,800 gallons by PoolMath....call it 25,000.

    Do as Richard320 says. Start cutting back your pump run time by an hour. Wait a few days. Check your FC. If it is not low enough, cut out another hour. Repeat as needed.


    Sent from my iPhone using Tapatalk

  15. Back To Top    #15

    Join Date
    Jul 2015
    Location
    Greenville, SC
    Posts
    19

    Re: HIGH FC Reading!

    Also, any suggestions on pump speeds during low & high speeds. Currently our low speed is 2200rpm and high speed from 3pm-9pm (just changed) is 2700rpm. Last question for the night THANKS!!!!!
    16x36 IG Vinyl (25k gallons), Pentair Sand Dollar Filter SD60, Intellichlor IC40 SWG, Intelliflo Superflo VS Pump, Polaris 360 Cleaner

  16. Back To Top    #16
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    11,620

    Re: HIGH FC Reading!

    Quote Originally Posted by khsjes27 View Post
    Also, any suggestions on pump speeds during low & high speeds. Currently our low speed is 2200rpm and high speed from 3pm-9pm (just changed) is 2700rpm. Last question for the night THANKS!!!!!
    What are the purposes of the split speeds? What is your pool doing?


    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

  17. Back To Top    #17

    TFP Guide

    pabeader's Avatar
    Join Date
    May 2015
    Location
    Dallas Ga
    Posts
    4,064

    Re: HIGH FC Reading!

    I've read a number of posts that suggest as low as 1100 rpm or even lower for slow speed. It's just enough to keep stuff moving but lowers the electric bill quite a bit.
    Bob - Palm Beach by San Juan Pools. approx 5000 gals., Pentair 320 cartridge filter (all new guts installed by me), Goldline SWG, 'New to me' Kreepy Krauly Sand Shark, Intermec 104 Timer Test kit: TF-100 w/Speed Stir

  18. Back To Top    #18
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: HIGH FC Reading!

    Quote Originally Posted by khsjes27 View Post
    Also, any suggestions on pump speeds during low & high speeds. Currently our low speed is 2200rpm and high speed from 3pm-9pm (just changed) is 2700rpm. Last question for the night THANKS!!!!!
    Can;t help there. I'm a Luddite. I still have a single speed pump with a mechanical timer and manual valves.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  19. Back To Top    #19

    Join Date
    Jul 2015
    Location
    Greenville, SC
    Posts
    19

    Re: HIGH FC Reading!

    Let me preface this by saying that the company that installed our pool did NOT "balance" our pool water when the job was completed .. that's another story for another day �� ... Anyway, they set the pump at 1400rpm but it seemed that the pool was cloudy. *of course it was .. It wasn't balanced* So we (the newbies ��) adjusted the pump speed UP after seeing that the water was cloudy. But really have no explanation for why we set it where we did ... Just being honest here

    Quote Originally Posted by JoyfulNoise View Post
    What are the purposes of the split speeds? What is your pool doing?


    Sent from my iPhone using Tapatalk
    16x36 IG Vinyl (25k gallons), Pentair Sand Dollar Filter SD60, Intellichlor IC40 SWG, Intelliflo Superflo VS Pump, Polaris 360 Cleaner

  20. Back To Top    #20
    JoyfulNoise's Avatar
    Join Date
    May 2015
    Location
    Tucson, AZ
    Posts
    11,620

    Re: HIGH FC Reading!

    Quote Originally Posted by khsjes27 View Post
    Let me preface this by saying that the company that installed our pool did NOT "balance" our pool water when the job was completed .. that's another story for another day �� ... Anyway, they set the pump at 1400rpm but it seemed that the pool was cloudy. *of course it was .. It wasn't balanced* So we (the newbies ��) adjusted the pump speed UP after seeing that the water was cloudy. But really have no explanation for why we set it where we did ... Just being honest here
    Let me ask it a different way - aside from the salt water chlorine generator, is there anything else in your pool that you need to run? Examples would be - in-floor cleaning system, suction or pressure side cleaners, water features like waterfalls or bubblers, deck jets, or an attached spa?

    - - - Updated - - -

    How many skimmers, main drains and returns do you have?

    - - - Updated - - -

    And what model and size sand filter do you have?
    Matt
    16k IG PebbleTec pool, 650gal spa, spillway and waterfall, 3HP IntelliFlo VS / 1.5HP WhisperFlo, Pentair QuadDE-100 filter, IC40 SWCG, MasterTemp 400k BTU/hr NG heater, KreepyKrauly suction-side cleaner Dolphin S300i robot, EasyTouch controls, city water, K-1001, K-2006 and K-1766 test kits, Mannitol test for borates

Page 1 of 2 12 LastLast

Posting Permissions

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