Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 16 of 16

Thread: My Pool After 20 Day Vacation

  1. Back To Top    #1

    Join Date
    Apr 2016
    Location
    Riverview, FL
    Posts
    351

    My Pool After 20 Day Vacation

    Almost 3 weeks on vacation and came back to pool that is clear. The pH was high at 9.0 but I expected that as my pH is always increasing.

    The FC also dropped from 5.2 to 2.8 even though SWG was set to 55. I had expected it to hold steady or be slightly higher than when I left. The only difference in my usual maintenance was I dropped pump RPM down to 1250 and ran 24 hours while I was gone, I did this in case power went out and mechanical timer got out of sync with my regular pump hours. So perhaps the lower flow reduces the efficiency of the salt generation? Something I'll keep an eye on.

    Otherwise just a little dirt due to storms that hit while away, so other than adding acid to drop the pH I just need to get my vacuum running to clean the bottom.

    Results before/after vacation:
    FC 5.2/2.6
    CC 0.0/0.0
    pH 7.6/9.0
    TA 80/80
    CH 350/350
    CYA 70/70
    Temp 78/78

    Free Form 13K IG (Quartz) w/Screen Enclosure - 2 Sheer Descents, 1 Bubbler - Hayward 60 SF DE Sta-Rite - Hayward SP3400VSP EcoStar - Hayward Aqua Rite AQR9 (T-Cell-9) SWG - Zodiac MX6 - July 2016 - Taylor K-2006 - Taylor K-1766 Salt Test

  2. Back To Top    #2

    Join Date
    Sep 2016
    Location
    Chandler, AZ
    Posts
    66

    Re: My Pool After 20 Day Vacation

    That's a good vacation!



    11,300 gal/ IG - Pebble tech pool & Spa / DE - Hayward Filter/2.0 HP pump single speed / Hayward cleaner/ built in early 2000's by California Pools / Taylor K2006 test kit

  3. Back To Top    #3
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    20,312

    Re: My Pool After 20 Day Vacation

    Who knows what blew in and used up the FC?

    Sounds like you have our way of maintenance figured out.
    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!

  4. Back To Top    #4

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,892

    Re: My Pool After 20 Day Vacation

    You might want to inspect the cell for scale.

    I calculated the pool was getting 3.6ppm of chlorine a day with those settings if the cell was working as it should have been.

    What were your settings before you left; pump time, RPM, and output%? I want to compare how much FC the SWG was making before you left.

    In the last few weeks I have had to increase my pump run time and output% for my pool's FC to maintain the desired level.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  5. Back To Top    #5
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    24,974

    Re: My Pool After 20 Day Vacation

    Nice job! And nice pool!

    I agree with Ping's line of thinking that more sun and more heat is leading to higher FC usage as the days get warmer and longer. I have also had to increase percentage and run time for my SWG to keep up. And the trees aren't helping me that much at the moment either.
    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

  6. Back To Top    #6

    Join Date
    Apr 2016
    Location
    Riverview, FL
    Posts
    351

    Re: My Pool After 20 Day Vacation

    Quote Originally Posted by ping View Post
    You might want to inspect the cell for scale.

    I calculated the pool was getting 3.6ppm of chlorine a day with those settings if the cell was working as it should have been.

    What were your settings before you left; pump time, RPM, and output%? I want to compare how much FC the SWG was making before you left.

    In the last few weeks I have had to increase my pump run time and output% for my pool's FC to maintain the desired level.
    The cell was installed new last September. I inspected it a month ago and there was literally no scale build up. Prior to my vacation I had been running it at 45% (was holding in the 4-5 FC range). I increased to 55% as I figure better to be over than short while gone.

    Prior to vacation pump was set to run 9AM-8PM, 1750 RPM for first 3 hours and then dropped to 1500 RPM for remainder of time. SWG was set to start 30 min after and 30 min prior to pump cycle. As suggestion from another here, I lowered RPM and set to run 24 hours just to be sure any power outage didn't occur and throw my SWG mechanical timer off from the pump timer.

    While I was gone the temps did jump to over 90 for a week and was at nearly 100 for three of the days. However pool temp was still the same at 78 degrees as when I left, so unless it raised and lowered it was basically unchanged. Maybe it's just the change in the longer days now more sun and burn off and it's just time to increase the output %.

    - - - Updated - - -

    Quote Originally Posted by Richard320 View Post
    Who knows what blew in and used up the FC?

    Sounds like you have our way of maintenance figured out.
    Yeah, the suggestions I've picked up here made my extended trip painless upon return. I thought this highlight the benefit of using the TFP method, seems to work really well!
    Free Form 13K IG (Quartz) w/Screen Enclosure - 2 Sheer Descents, 1 Bubbler - Hayward 60 SF DE Sta-Rite - Hayward SP3400VSP EcoStar - Hayward Aqua Rite AQR9 (T-Cell-9) SWG - Zodiac MX6 - July 2016 - Taylor K-2006 - Taylor K-1766 Salt Test

  7. Back To Top    #7
    Killer95Stang's Avatar
    Join Date
    Aug 2012
    Location
    Sunny SoCal
    Posts
    700

    Re: My Pool After 20 Day Vacation

    Looks good.... Im currently on my last day of a 3 week vacation to Japan and I can't wait to get back to the pool. Unlike you, I put the solar cover on before I left and lowered the swcg down from 35% to 25%, since the cover will cut down on fac usage. About 1-1/2 weeks into the trip, I had a neighbor come down to add some MA. My plan is to balance the water when I get home and probably throw the Discovery in for a coupke cycles... then jump in and enjoy the rest of the week before I go back to the grind.
    Pool done!! (backyard = work in progress) 32' x 19' inground freeform with 7' spa, baja step w/ (2) bubblers, stonescapes mini pebble finish, rock waterfall feature, 12" raised bond beam, Intelliflo VS, Whisperflo feature pump, (3) 5G Color LED's, FNS + DE 60, 400K Master Temp, Easytouch 8 w/ remote, Intellichlor IC40, Vision Classic Ceramic Kamado smoker, Margaritaville DM1000!!! Party Coming Soon!!
    TF-100 Test Kit w/ Speedstir

  8. Back To Top    #8

    Join Date
    Apr 2016
    Location
    Riverview, FL
    Posts
    351

    Re: My Pool After 20 Day Vacation

    I found that upon my return I increased my SWG output to 100% for the past day, FC has climbed back to 5.0 in that day's time. That is an increase of 2.5ppm plus the offset of the burn off loss in one day. Does that indicate that cell is operating as it should?
    Free Form 13K IG (Quartz) w/Screen Enclosure - 2 Sheer Descents, 1 Bubbler - Hayward 60 SF DE Sta-Rite - Hayward SP3400VSP EcoStar - Hayward Aqua Rite AQR9 (T-Cell-9) SWG - Zodiac MX6 - July 2016 - Taylor K-2006 - Taylor K-1766 Salt Test

  9. Back To Top    #9
    Killer95Stang's Avatar
    Join Date
    Aug 2012
    Location
    Sunny SoCal
    Posts
    700

    Re: My Pool After 20 Day Vacation

    You would have to look in the manual for the output per hour for your swg, then guestimate a little on daily usage to subtract from the stated output.

    If you raised 5 to 6 ppm in a day, that sounds like it is humming along just fine.
    Pool done!! (backyard = work in progress) 32' x 19' inground freeform with 7' spa, baja step w/ (2) bubblers, stonescapes mini pebble finish, rock waterfall feature, 12" raised bond beam, Intelliflo VS, Whisperflo feature pump, (3) 5G Color LED's, FNS + DE 60, 400K Master Temp, Easytouch 8 w/ remote, Intellichlor IC40, Vision Classic Ceramic Kamado smoker, Margaritaville DM1000!!! Party Coming Soon!!
    TF-100 Test Kit w/ Speedstir

  10. Back To Top    #10

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,892

    Re: My Pool After 20 Day Vacation

    Before vacation the SWG was adding about 1.2ppm of FC each day which is very reasonable for the water temp and time of year. The SWG is producing chlorine as the level did increase with a longer run time. For peace of mind, I suggest running an OCLT to rule out organics. I have a feeling it is that time of year that the SWG needs more time to keep up with the demand from the sun.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  11. Back To Top    #11

    Join Date
    Apr 2016
    Location
    Riverview, FL
    Posts
    351

    Re: My Pool After 20 Day Vacation

    Quote Originally Posted by ping View Post
    Before vacation the SWG was adding about 1.2ppm of FC each day which is very reasonable for the water temp and time of year. The SWG is producing chlorine as the level did increase with a longer run time. For peace of mind, I suggest running an OCLT to rule out organics. I have a feeling it is that time of year that the SWG needs more time to keep up with the demand from the sun.
    Thanks ping for the response. I did a OCLT about 2 weeks before vacation just to have a peace of mind nothing was going to happen. There was no change from night test to morning test.

    Pool was finished last July, and there were issues with the salt unit that PB installed (had an AutoPilot SWG unit that would randomly put itself into Boost mode), PB replaced with AquaRite in September. So this is first Spring with operating the pool and nothing to refer back to in Summer as to what the % output since I didn't have the AR unit then. So I'll just understand for now that I was under on my SWG output % need which resulted in the FC dropping while I was gone and that higher than normal heat in that time also contributed. Now that FC is back to higher normal level I've set the SWG to 60% and monitor how that runs for the rest of the year.
    Free Form 13K IG (Quartz) w/Screen Enclosure - 2 Sheer Descents, 1 Bubbler - Hayward 60 SF DE Sta-Rite - Hayward SP3400VSP EcoStar - Hayward Aqua Rite AQR9 (T-Cell-9) SWG - Zodiac MX6 - July 2016 - Taylor K-2006 - Taylor K-1766 Salt Test

  12. Back To Top    #12

    Join Date
    Apr 2016
    Location
    Riverview, FL
    Posts
    351

    Re: My Pool After 20 Day Vacation

    Quote Originally Posted by Killer95Stang View Post
    You would have to look in the manual for the output per hour for your swg, then guestimate a little on daily usage to subtract from the stated output.

    If you raised 5 to 6 ppm in a day, that sounds like it is humming along just fine.
    Nothing in the manual on output, but search found a source that shows 0.965/lbs per day. Now what it doesn't indicate is what is a day. 24 hour run time or 8 hour run time. Will have to continue the search on that. Thanks
    Free Form 13K IG (Quartz) w/Screen Enclosure - 2 Sheer Descents, 1 Bubbler - Hayward 60 SF DE Sta-Rite - Hayward SP3400VSP EcoStar - Hayward Aqua Rite AQR9 (T-Cell-9) SWG - Zodiac MX6 - July 2016 - Taylor K-2006 - Taylor K-1766 Salt Test

  13. Back To Top    #13

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,892

    Re: My Pool After 20 Day Vacation

    A T-9 cell can output .7lbs. of chlorine in 24 hours of run time if the output is set to 100%.

    That is 11.2 ounces of chlorine gas and if you use PoolMath and enter your gallons and ounces of chlorine gas in effects of adding chemicals at the bottom of the page you can get how many ppm of fc the SWG will produce in your pool.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  14. Back To Top    #14

    Join Date
    Apr 2016
    Location
    Riverview, FL
    Posts
    351

    Re: My Pool After 20 Day Vacation

    Ping - what did you reference for source of the T-9 output? I had looked on Hayward's site and didn't find any details but did find info on this site (they sell the T-9) and it shows as .965. Based on other sources the T-15 generated 1.4lbs around so .9lbs seems to be right (mathematically), the .7 would seem low as that would be half the T-15. If my math is right then the .965 would be 15.4 ounces of chlorine gas.

    If you have Hayward link for reference that would be great so I can be sure what the output is. Depending on what the actual output is my cell is producing either 6.5 FC or 8.9 FC in 24 hour period. Using my 1 day change with cell at 100% (run time of 10 hours) my FC went from 2.6 to 5.0. So either my daily use is either 0.3 (2.6+2.7-5.0) or 1.3 (2.6+3.7-5.0). I hadn't looked into calculating the FC generated and the daily use so this has been helpful for my understanding and I can then back in to what my SWG output should be based on daily FC burn ratio.

    Thanks
    Free Form 13K IG (Quartz) w/Screen Enclosure - 2 Sheer Descents, 1 Bubbler - Hayward 60 SF DE Sta-Rite - Hayward SP3400VSP EcoStar - Hayward Aqua Rite AQR9 (T-Cell-9) SWG - Zodiac MX6 - July 2016 - Taylor K-2006 - Taylor K-1766 Salt Test

  15. Back To Top    #15

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,892

    Re: My Pool After 20 Day Vacation

    I was using this site, Welcome to Discount Salt Pool - Saltwater Chlorine Generators - Chlorinators that has a brand comparison.

    However, you are right with your numbers. Hayward's website does list the actual output of each cell and the total expected output for the life of the cell. If you compare the cells you will get the output numbers.

    Thanks for pointing this out!
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  16. Back To Top    #16

    Join Date
    Apr 2016
    Location
    Riverview, FL
    Posts
    351

    Re: My Pool After 20 Day Vacation

    Thanks ping, I had saw the capacity output but confused it with the capacity of the cell (lifetime) and that didn't make sense. I see now it's the expected yearly This was very helpful. I've created a spreadsheet that calculates the expected change (FC, pH and Salt) based on run time and output %. I guess a spreadsheet may already exist but it was useful as it helped me to understand the details to create it, not just the output.
    Free Form 13K IG (Quartz) w/Screen Enclosure - 2 Sheer Descents, 1 Bubbler - Hayward 60 SF DE Sta-Rite - Hayward SP3400VSP EcoStar - Hayward Aqua Rite AQR9 (T-Cell-9) SWG - Zodiac MX6 - July 2016 - Taylor K-2006 - Taylor K-1766 Salt Test

Posting Permissions

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