Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 30

Thread: backwashing

  1. Back To Top    #1

    Join Date
    May 2015
    Location
    Clarksville
    Posts
    142

    backwashing

    I notice over the past 2 weeks I've needed to backwash twice per week. I especially noticed an increase in pressure gauge reading last Monday and yesterday after my kids had been in it.

    no water problems, and swg
    was added this year.

    last season I had to backwash once per week, or sometimes once every 2 weeks.

    the sand and filter are new. it was purchased last summer.

    what is normal as far as how often you should need to backwash?

    vinyl soft sided pool
    intex 1500 gph sand filter and intex swg at 1500 gph.

  2. Back To Top    #2

    Re: backwashing

    I don't know "normal," I usually rely on the pressure reading. Had my pool opened last week but I was not present when it happened so I can't speak to their procedure. Pressure was good yesterday, a week after the open, nowhere near backwash range. In normal use I do it once a week.
    Geebot
    Chicago, IL
    30K gal, InGround Plaster Finish, 3.5'-9.5', Maytronics S300 Cleaner

  3. Back To Top    #3
    borjis's Avatar
    Join Date
    Aug 2014
    Location
    Pacific NW
    Posts
    2,055

    Re: backwashing

    I had to backwash yesterday and was also surprised it needed it, but then again
    there was heavy pollen the last 3 weeks, that had to be it.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

  4. Back To Top    #4

    Join Date
    May 2015
    Location
    Clarksville
    Posts
    142

    Re: backwashing

    well, I have to go outside later today to turn it on, so nilly see what the pressure gauge says then.

    we also have had a lot of pollen. the water has gad a lot of debris from trees in it to the point of hand skimming to get it all out.

    vinyl soft sided pool
    intex 1500 gph sand filter and intex swg at 1500 gph.

  5. Back To Top    #5
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: backwashing

    Please add your state to your location in your profile so it shows up over there <-----, climate is an important factor when we are helping you with your pool. Please add your pool info to your signature so that we know what kind of pool and equipmemt we are helping you with, more here, Pool School - Read This Before You Post

    Please tell us what test kit you are testing with.
    Please post your recent test results.

    We recommend that you backwash your filter when the pressure rises 25% above clean pressure.

    Most often when filters clog rapidly it is due to algae growing in the pool due to insufficient chlorine relative to the CYA level and the Chlorine CYA Chart. Any time the FC drops below minimum level algae can start growing.

    If algae or organic material is suspected of contributing to the filter clogging issues then you can Perform the Overnight FC Loss Test (OCLT) to see if there is organic material in your pool consuming chlorine.
    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

    TFP Guide
    PAGirl's Avatar
    Join Date
    Jun 2012
    Location
    Central PA
    Posts
    2,388

    Re: backwashing

    Could your filter be undersized?
    26' X 52" Intex Ultra Frame. Intex Sand Filter
    26' X 52 Intex Ultra Frame Install
    You can lead a horse to (clear) water, but you can't force him to swim in it!

  7. Back To Top    #7

    Join Date
    May 2015
    Location
    Clarksville
    Posts
    142

    Re: backwashing

    Quote Originally Posted by PAGirl View Post
    Could your filter be undersized?
    should be fine. 1500gph filter. 18/52 @7000 gallons. intex sand filter and swg

    it did great all last season. so I'm tending to agree with what was said above. I did test today and chlorine was kinda low, @ 2.0 & FC at only 2.5

    currently I have the pool master 5 way test kit.

    based on acid demand test at 1 it says I should add 1-1/4 cup of acid, which I don't currently have.

    ta was 50 and ph is 7.8

    I will figure out how to add all that stuff to signature but I hope what I provided here will still help.



    vinyl soft sided pool
    intex 1500 gph sand filter and intex swg at 1500 gph.

  8. Back To Top    #8
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: backwashing

    Twice a year for me.

    If it's massive quantities of pollen, a knee-high nylon stretched over the skimmer basket will catch a lot of it before it gets to the filter.




    But I also wonder if it isn't a nascent algae bloom. By your own admission, FC is low... 2 is too low for nop CYA, and if you have CYA in the water, it makes it even less effective. Do you chlorinate with pucks?
    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!

  9. Back To Top    #9

    TFP Guide
    PAGirl's Avatar
    Join Date
    Jun 2012
    Location
    Central PA
    Posts
    2,388

    Re: backwashing

    I have an Intex sand filter. The gauge failed quickly. When my water is clear, I only backwash every 4-5 weeks.
    26' X 52" Intex Ultra Frame. Intex Sand Filter
    26' X 52 Intex Ultra Frame Install
    You can lead a horse to (clear) water, but you can't force him to swim in it!

  10. Back To Top    #10

    Join Date
    May 2015
    Location
    Clarksville
    Posts
    142

    Re: backwashing

    Quote Originally Posted by Richard320 View Post
    Twice a year for me.

    If it's massive quantities of pollen, a knee-high nylon stretched over the skimmer basket will catch a lot of it before it gets to the filter.




    But I also wonder if it isn't a nascent algae bloom. By your own admission, FC is low... 2 is too low for nop CYA, and if you have CYA in the water, it makes it even less effective. Do you chlorinate with pucks?
    no my pool is swg

    yes I added stabilizer but like you said at such low chlorine levels, it's not gonna make much difference.

    that is today's test btw
    vinyl soft sided pool
    intex 1500 gph sand filter and intex swg at 1500 gph.

  11. Back To Top    #11

    Join Date
    May 2015
    Location
    Clarksville
    Posts
    142

    Re: backwashing

    Quote Originally Posted by PAGirl View Post
    I have an Intex sand filter. The gauge failed quickly. When my water is clear, I only backwash every 4-5 weeks.
    oh wow. I don't think my gauge is bad. I've only noticed this override the past 2 weeks. last week was moreso.

    I didn't have to backwash today like I thought I would have too. I will check again to make sure in the morning.
    vinyl soft sided pool
    intex 1500 gph sand filter and intex swg at 1500 gph.

  12. Back To Top    #12
    Mod Squad kimkats's Avatar
    Join Date
    Jul 2012
    Location
    Tallahassee, FL
    Posts
    26,692

    Re: backwashing

    Melody, I am worried you might have a slight algae bloom trying to happen. Can you do this test (OCLT) tonight/tomorrow morning?

    Pool School - Perform the Overnight FC Loss Test (OCLT)

    Most of the time when we see a increased need for backwashing or filters needing to be clean more often it points to needed to do a SLAM for a couple of days to clear up what is going on in the water.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  13. Back To Top    #13

    Join Date
    May 2015
    Location
    Clarksville
    Posts
    142

    Re: backwashing

    FCU lastnight was 2.5. today it was 2 0.

    we get a lot of sun on our pool so that may be why the loss.

    I was asking in another post how much liquid bleach to use.
    probably the water needs shocked. but I've never used liquid before. last year I had regular chlorine tabs and shock bags.

    I have a couple extra shock bags from last year, but all swg info I've read says not to use powder chlorine as it reduces cell life.
    vinyl soft sided pool
    intex 1500 gph sand filter and intex swg at 1500 gph.

  14. Back To Top    #14

    Join Date
    Apr 2013
    Location
    Sacramento, CA
    Posts
    2,769

    Re: backwashing

    Melody you need to get either a k-2006 or TF 100 test kit and test your water. I suspect you have massive amounts of cya in the water and zero effective chlorine. But we need some test results. With test results we can help bring your pool back and you will not need to be spending so much time maintaining it.

    Yes Index filters are undersized, but even with that undersized filter you should only be back washing once a month.
    22k gallon IG pebblefina, Jandy 1.5 HP VS, Jandy CV Cartridge filter, Fafco solar panels, Polaris 360 supply side cleaner, waterfall

  15. Back To Top    #15

    Join Date
    May 2015
    Location
    Clarksville
    Posts
    142

    Re: backwashing

    Quote Originally Posted by gwegan View Post
    Melody you need to get either a k-2006 or TF 100 test kit and test your water. I suspect you have massive amounts of cya in the water and zero effective chlorine. But we need some test results. With test results we can help bring your pool back and you will not need to be spending so much time maintaining it.

    Yes Index filters are undersized, but even with that undersized filter you should only be back washing once a month.
    hmm. even last year Vick wash was once every 2 weeks or once every week.
    intex recommends once a week but I just watch the pressure gauge.

    I may not have the Taylor test kit till after the first. (end of month. no money)
    vinyl soft sided pool
    intex 1500 gph sand filter and intex swg at 1500 gph.

  16. Back To Top    #16

    Join Date
    May 2015
    Location
    Clarksville
    Posts
    142

    Re: backwashing

    ok. so I got the test kit ordered. I was afraid I wouldn't get to till friday. but it still isn't going to be here till the end of week. so I think what I will do in the meantime is vacuum/sweep the pool, and run a boost cycle with swg. all I can do for now till kit gets here.
    vinyl soft sided pool
    intex 1500 gph sand filter and intex swg at 1500 gph.

  17. Back To Top    #17
    Mod Squad kimkats's Avatar
    Join Date
    Jul 2012
    Location
    Tallahassee, FL
    Posts
    26,692

    Re: backwashing

    Melody, That is awesome news! You are going to love how your pool looks when we are done with it!

    You can also add 1/2 jug of bleach (plain, unscented bleach) each day with the pump running.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

  18. Back To Top    #18

    Join Date
    Jun 2014
    Location
    Rogers, AR
    Posts
    412

    Re: backwashing

    Quote Originally Posted by borjis View Post
    I had to backwash yesterday and was also surprised it needed it, but then again
    there was heavy pollen the last 3 weeks, that had to be it.
    I am getting killed with pollen. Between that and being downwind on some serious road construction I am backwashing twice a week. My skimmer socks are just coated with yellow.
    16x32 IG rectangular 21,800k new vinyl liner 2014, Triton II TR 50 sand Filter, Pentair 3/4 hsp whisperflow pump, 3 returns, TF100 test kit w/speedstir. Maytronics s 300i robot.

  19. Back To Top    #19

    Join Date
    May 2015
    Location
    Clarksville
    Posts
    142

    Re: backwashing

    Quote Originally Posted by kimkats View Post
    Melody, That is awesome news! You are going to love how your pool looks when we are done with it!

    You can also add 1/2 jug of bleach (plain, unscented bleach) each day with the pump running.

    Kim
    my pool water is clear, so like you I suspected some unseen growth started to hapoen
    vinyl soft sided pool
    intex 1500 gph sand filter and intex swg at 1500 gph.

  20. Back To Top    #20

    Join Date
    May 2015
    Location
    Clarksville
    Posts
    142

    Re: backwashing

    BTW my pool is running an intex swg. I think I mentioned that before. but I will go add the bleach today to help.
    vinyl soft sided pool
    intex 1500 gph sand filter and intex swg at 1500 gph.

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
  •