Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 18 of 18

Thread: Bleach with SWG?

  1. Back To Top    #1

    Join Date
    Jun 2013
    Location
    Southeast Pennsylvania
    Posts
    117

    Bleach with SWG?

    If I want to get my FC level up, can I use bleach even though I have a SWG? This year, I'm having trouble "shocking" my pool with my SWG. This pool just started its second year. Last year, I could easily raise my level by turning my SWG to 50% production and it would take maybe 4 hours. I've had my SWG at 100% the last few days and yesterday it tested FC of only 1. Last year, I did have a mineral cartridge, so maybe that helped? Anyway, can I add bleach to raise FC instead of using the SWG?
    13,500 Gallon Gunite Aggregate Finish, DE, SWG, 2.0 HP pump, 1.0 HP pump for 3 Sheer Descents

  2. Back To Top    #2
    Defgufman's Avatar
    Join Date
    Mar 2015
    Location
    Savannah GA
    Posts
    577

    Re: Bleach with SWG?

    You can always augment with liquid chlorine if needed. I'm glad you abandoned the mineral packs. I think if you are slamming, I'd go all liquid until done and turn on the swg to maintain FC afterwards.
    Inground 13,200 gal Vinyl, Pentair 3/4 hp pump, Pentair Sand Dollar filter, Polaris 280

    Pool School, Pool Math, CYA to FC ratio chart, Testing Kits

  3. Back To Top    #3

    In the Industry

    Donldson's Avatar
    Join Date
    Jun 2009
    Location
    NW Ohio
    Posts
    2,637

    Re: Bleach with SWG?

    Yes, in fact it is highly encouraged to do that since it saves cell life and gives you an instant boost of FC instead of a gradual increase.

    Sounds like you might have a failing cell or more likely something consuming your FC, would you mind posting a set of test results so we can offer an opinion of which it could be?
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

  4. Back To Top    #4

    Join Date
    Jun 2013
    Location
    Southeast Pennsylvania
    Posts
    117

    Re: Bleach with SWG?

    Thanks Guys. I certainly hope my cell is failing....it is only a year old. Here are my latest test results:

    FC - 1
    CC - .4
    pH - 7.4
    TA - 135
    CH - 325
    CYA - 55
    Salt - 3,200
    13,500 Gallon Gunite Aggregate Finish, DE, SWG, 2.0 HP pump, 1.0 HP pump for 3 Sheer Descents

  5. Back To Top    #5

    Join Date
    Jun 2013
    Location
    Southeast Pennsylvania
    Posts
    117

    Re: Bleach with SWG?

    Correction on the FC and CC. I just tested. FC is at .6 and CC is at .2. This is frustrating.....I think my cell is failing and it is brand new. Maybe I should look at it and see if it needs cleaning. I have not ever cleaned it. Any advise here on that?? My manual says to dilute muriatic acid 1 part to 10 parts water and soak the cell for a period of time. Does this sound right?
    13,500 Gallon Gunite Aggregate Finish, DE, SWG, 2.0 HP pump, 1.0 HP pump for 3 Sheer Descents

  6. Back To Top    #6

    In the Industry

    Donldson's Avatar
    Join Date
    Jun 2009
    Location
    NW Ohio
    Posts
    2,637

    Re: Bleach with SWG?

    Your CYA is a bit low for an SWG, it does cause the cell to work a bit harder because more FC is destroyed by sunlight. Other than that nothing too out of line except your FC of course.

    To see if it is your cell you should perform an Overnight CL Loss Test. Shut off your SWG and bring yourself up to shock level using bleach (24 FC for you). If you pass then your cell is the problem and you can go down that path. If you fail then you have some growth and need to SLAM your pool. Remember, SLAM is a process, not just a short sharp shock.
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

  7. Back To Top    #7

    Join Date
    Jun 2013
    Location
    Southeast Pennsylvania
    Posts
    117

    Re: Bleach with SWG?

    I will perform that test, but how will that tell me anything about my cell? The test just tells me if my FC is being consumed overnight. Also, what do you suggest for a CYA level and how do you suggest I increase it?

    I just added 18 oz of bleach that is 8.25%....that should get me to FC of 1.5
    13,500 Gallon Gunite Aggregate Finish, DE, SWG, 2.0 HP pump, 1.0 HP pump for 3 Sheer Descents

  8. Back To Top    #8

    In the Industry

    Donldson's Avatar
    Join Date
    Jun 2009
    Location
    NW Ohio
    Posts
    2,637

    Re: Bleach with SWG?

    The inability of your SWG to raise your FC is either because something is consuming it just as fast as it is generating it, or because it is not working correctly. You want to rule out the former before you start working on the latter.

    Recommended Levels
    JD - 28' Round Above Ground Pool, 17,000 Gallons. Dual speed Jacuzzi pump with cartridge filter. Dual speed 1 HP pump, Hayward S210T sand filter
    Pool School - PoolMath - HIGHLY Recommended Test Kits

  9. Back To Top    #9

    TFP Guide

    Azgirl71's Avatar
    Join Date
    Apr 2015
    Location
    Sierra Vista, Az
    Posts
    2,586

    Re: Bleach with SWG?

    With a SWG you want your CYA to be 70-75.
    I would wait to raise it just yet and perform the OLCT first. If you lose more than 1ppm overnight you should SLAM.

    What you need to do right now is add enough bleach to target a level of 24 as Donaldson said.
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

  10. Back To Top    #10
    Divin Dave's Avatar
    Join Date
    Oct 2013
    Location
    Longview, Texas
    Posts
    4,926

    Re: Bleach with SWG?

    1.5? why are you going only for 1.5?
    Do you know the FC level you need to keep your Pool clean is dependenent on the CYA level?
    http://www.troublefreepool.com/conte...art-slam-shock.



    Quote Originally Posted by dubele View Post
    I will perform that test, but how will that tell me anything about my cell? The test just tells me if my FC is being consumed overnight. Also, what do you suggest for a CYA level and how do you suggest I increase it?

    I just added 18 oz of bleach that is 8.25%....that should get me to FC of 1.5
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

  11. Back To Top    #11

    Join Date
    Jun 2013
    Location
    Southeast Pennsylvania
    Posts
    117

    Re: Bleach with SWG?

    Are you guys saying I need my FC level at 24?? Isn't 3 times the shock level?
    13,500 Gallon Gunite Aggregate Finish, DE, SWG, 2.0 HP pump, 1.0 HP pump for 3 Sheer Descents

  12. Back To Top    #12

    TFP Guide

    Azgirl71's Avatar
    Join Date
    Apr 2015
    Location
    Sierra Vista, Az
    Posts
    2,586

    Re: Bleach with SWG?

    You said CYA was 55 correct? If so then SLAM level is 24

    - - - Updated - - -

    Here is a link to the chart.
    http://www.troublefreepool.com/content/128-chlorine-cya-chart-slam-shock You fall in between CYA. At 24 this will help keep it at or above SLAM levels
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

  13. Back To Top    #13
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: Bleach with SWG?

    Yes, I often use bleach to augment my chlorine level. Much easier and more precise. Sounds to me like you have algae consuming your chlorine.

    Here is the Water Balance for a SWCG pool.

    This Chlorine CYA Chart is the key to how to chlorinate your pool. Never let the FC level drop below the minimum for your CYA level or algae will start to grow.

    I recommend SLAMing Your Pool
    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

  14. Back To Top    #14

    Join Date
    Jun 2013
    Location
    Southeast Pennsylvania
    Posts
    117

    Re: Bleach with SWG?

    Just so I'm clear, it looks like I need about 450 oz of 8.5% bleach to get my FC to 24. Does this sound about right?
    13,500 Gallon Gunite Aggregate Finish, DE, SWG, 2.0 HP pump, 1.0 HP pump for 3 Sheer Descents

  15. Back To Top    #15

    TFP Guide

    Azgirl71's Avatar
    Join Date
    Apr 2015
    Location
    Sierra Vista, Az
    Posts
    2,586

    Re: Bleach with SWG?

    If that is what pool math calculator says then yes. Make sure all you numbers are plugged in and you have the correct gallons in the the box
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

  16. Back To Top    #16
    robdac's Avatar
    Join Date
    Jun 2014
    Location
    Weston, FL
    Posts
    232

    Re: Bleach with SWG?

    I had the same problem with my pool a week ago. Turned out it was algae and not the SWCG. The first indication of a problem was that I had to keep cranking up the SWCG and the FC never recovered to recommended levels. Algae was confirmed by the OCLT. I caught it early and the pool remained nice and clear throughout the SLAM. I'd bet your SWCG is fine but you won't know until after the OCLT. Make sure the SWCG is off during the OCLT.
    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

  17. Back To Top    #17
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,999

    Re: Bleach with SWG?

    Quote Originally Posted by robdac View Post
    I had the same problem with my pool a week ago. Turned out it was algae and not the SWCG. The first indication of a problem was that I had to keep cranking up the SWCG and the FC never recovered to recommended levels. Algae was confirmed by the OCLT. I caught it early and the pool remained nice and clear throughout the SLAM. I'd bet your SWCG is fine but you won't know until after the OCLT. Make sure the SWCG is off during the OCLT.
    Nice 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

  18. Back To Top    #18

    Join Date
    Sep 2014
    Location
    Oviedo, FL
    Posts
    59

    Re: Bleach with SWG?

    Quote Originally Posted by robdac View Post
    I had the same problem with my pool a week ago. Turned out it was algae and not the SWCG. The first indication of a problem was that I had to keep cranking up the SWCG and the FC never recovered to recommended levels. Algae was confirmed by the OCLT. I caught it early and the pool remained nice and clear throughout the SLAM. I'd bet your SWCG is fine but you won't know until after the OCLT. Make sure the SWCG is off during the OCLT.

    Same thing as robdac happened to me too; I suspected my SWCG, turned out to be algae...I'll admit that going thru the SLAM the first time was daunting...it really bugged me that I felt out of control...but all the advice here is sound. This process works.
    And when you make it out on the other side (crystal water and all!) you'll have such a deeper understanding of your pool and how to maintain it...the TFP way!
    ~Adam 12K gal free-form pool with spa, Hayward EcoStart VS pump, Hayward T-15 SWCG, Hayward C17502 filter, Hayward Heat PumpPro 140k BTU, Stonescapes minipebble. tf-100 & speedstir.
    5.5 foot retaining wall. Build completed in Feb 2015.
    East Central FL.

Posting Permissions

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