Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 20 of 20

Thread: Draining Pool??

  1. Back To Top    #1
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Draining Pool??

    I have an apparent high CYA level 151, confirmed at pool store twice. The previous home owner left multiple pucks in skimmers and floating chlorinator. I have two friends who both "gasped" when I told them my apparent level. I ordered a TF-100 yesterday. One friend said I will have to drain off "some" of the water. Another friend who used to take care of pools said "all" and scrub the plaster walls, rinse and drain off residual. I've heard horror stories about draining pools and causing thousands of dollars worth of damage from pools floating out of the ground. Suggestions?
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  2. Back To Top    #2

    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Location
    Greenville, SC
    Posts
    1,798

    Re: Draining Pool??

    Pool store testing of CYA is notoriously bad. I suggest waiting on the TF-100 before doing anything. IF those results are close, you are looking at 2-3 partial drains and refills, nothing dramatic.
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  3. Back To Top    #3
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Re: Draining Pool??

    Awesome. Didn't want to completely drain the pool and scrub. Seemed like overkill to me.
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  4. Back To Top    #4


    TFP Guide

    cowboycasey's Avatar
    Join Date
    Jul 2013
    Location
    Fletcher, OK
    Posts
    3,346

    Re: Draining Pool??

    I agree, Your CYA may be high but it is unknown until you get your test kit... When you do the test if it hits 100 it is probably higher than that..

    Take 1 quart pool water and 1 quart tap water and mix, then use that water to test your CYA and see what you get.

    her is an example: say its 70, it would be 70x2= 140 CYA

    are you still on water rationing in WF? it is suppose to rain this weekend here, just up the road looks like your having a 40% chance of rain on Sun, can you drop you water 6 inches and let it fill back up? if it does not fill back up all the way you can add some... every little bit of water replacement will help dropping your CYA...
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

  5. Back To Top    #5
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Re: Draining Pool??

    Cowboy
    The good Lord answered our prayers last May and continues to do so. Our lakes are 100% full! I plan on using my sump pump and will drain off a good portion on Saturday. Should have my TF-100 kit next Mon or Tuesday. Thanks for the reply.
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  6. Back To Top    #6


    TFP Guide

    cowboycasey's Avatar
    Join Date
    Jul 2013
    Location
    Fletcher, OK
    Posts
    3,346

    Re: Draining Pool??

    awesome, give you some help

    If you add 2 gallons of bleach before you do it (effectively taking to SLAM level or close) you have a better chance of not turning green while your pump is off, then you can hopefully get some rain water and have to fill less using tap water

    isn't it great seeing full lakes and ponds...
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

  7. Back To Top    #7
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Re: Draining Pool??

    It is an awesome sight! I didn't think Arrowhead or Kemp would ever recover. But they are at full capacity. It was to the point that we were seriously looking at moving to greener pastures. I'll dump some liquid bleach in tomorrow morning, then start the process in the afternoon. Thanks again!
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  8. Back To Top    #8
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Re: Draining Pool??

    Okay...my test kit came in Saturday and I promptly began draining off roughly 4000 gallons. On Friday, I SLAMed the pool with 2 gallons 8.25% bleach. Here are my numbers after re-fill and testing:
    FC 16
    Tot ALK 120
    CH 350
    CYA 100
    pH 7.0

    CYA level is still too high, but I'm opposed to draining off anymore H20 than I have to. Suggestions moving forward?
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  9. Back To Top    #9


    TFP Guide

    cowboycasey's Avatar
    Join Date
    Jul 2013
    Location
    Fletcher, OK
    Posts
    3,346

    Re: Draining Pool??

    You can SLAM with a 100 CYA, you are going to use a lot of chlorine/bleach because the SLAM level is so high..

    What is your CC now
    Your pH is a little low but I think it will raise during your SLAM...

    I am using my phone so please excuse any spelling errors and short response.
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

  10. Back To Top    #10
    Mod Squad YippeeSkippy's Avatar
    Join Date
    Jan 2012
    Location
    'burbs of Augusta, Georgia
    Posts
    6,461

    Re: Draining Pool??

    Is your pool showing algae?

    Adding 2 gallons of bleach isn't a SLAM, you just stunned the algae a bit but didn't *maintain* the required SLAM level long enough to do them in before they multiply.

    You need to re-test that CYA again using equal parts pool water and tap water. Then double the results. You may still need to drain again, sadly.
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

  11. Back To Top    #11
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Re: Draining Pool??

    No algae to speak of. I will retest CYA level, probably tomorrow and report again.
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  12. Back To Top    #12
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Re: Draining Pool??

    I poured in two gallons of bleach on Friday, prior to my 50% drain on Saturday as recommended on this forum to prevent the pool water from turning green. So it really wasn't a SLAM as defined by this website. Disappointed my CYA level is still high. I will retest ASAP and go from there.
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  13. Back To Top    #13

    TFP Guide
    Mr Bruce's Avatar
    Join Date
    Mar 2014
    Location
    Greenville, SC
    Posts
    1,798

    Re: Draining Pool??

    Well if your water is clear, you have <=0.5 CC, and you don't lose more that 1 FC overnight, you don't have to SLAM. And if you didn't want to drain anymore you would target 12 FC and never let it drop below 7 Pool School - Chlorine / CYA Chart
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

  14. Back To Top    #14


    TFP Guide

    cowboycasey's Avatar
    Join Date
    Jul 2013
    Location
    Fletcher, OK
    Posts
    3,346

    Re: Draining Pool??

    ^^^ I agree, if your pool is passing the OCLT then you do not have to SLAM, Knowing is half the battle, you now know your CYA level and it will go down slowly as you backwash and fill over the summer.

    Once we know what your CYA is you just keep FC at that level
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

  15. Back To Top    #15
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Re: Draining Pool??

    Hey!! I like this option better. Thanks Mr Bruce.
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  16. Back To Top    #16
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Re: Draining Pool??

    This is great. I truly appreciate all the knowledge you veterans are giving this rookie! Thanks a million.
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  17. Back To Top    #17
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Re: Draining Pool??

    CYA confirmed to be 100+. PH at 7.3. I am targeting FC at 12+. How am I doing, guys?
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  18. Back To Top    #18


    TFP Guide

    cowboycasey's Avatar
    Join Date
    Jul 2013
    Location
    Fletcher, OK
    Posts
    3,346

    Re: Draining Pool??

    You are doing great, I just want to confirm 1 thing, when you say 100+ CYA, does that mean at 100

    Did you do the CYA test with 1 quart pool water and 1 quart tap water and use that as your CYA water, you would do the following example with your number.

    say 70 CYA multiply by 2 = 140 CYA with the diluted mixture.

    If your CYA actually is 100 then 12 is your target level
    Pool: Intex 16x32 15000 gal, 2 speed 340042, Pentair CC320 Filter, CircuPool SJ45 Salt System, Intermatic PE653RC; Hot Tub: 650 Gal SWG Megachlor
    links: pool school * Recommended-Levels * SLAM * CYA chart * Test kits * How To Post Pictures * Poolmath * OCLT ** Support your website if we helped you :) **

  19. Back To Top    #19
    rboutwell's Avatar
    Join Date
    May 2016
    Location
    Wichita Falls/Texas
    Posts
    27

    Re: Draining Pool??

    Yes on qt for qt. The water level is "almost" to the 100 line level when the black dot disappears. So...I don't know the exact CYA level. Ballpark it is close to 100.
    Ray Boutwell, Wichita Falls, TX
    8,500 gallon IG, pebble pool, 425 gallon IG spa (no heater yet)
    Hayward Variable speed pump (2)
    sand filter for pool, cartridge filter for spa
    Taylor 2006c

  20. Back To Top    #20
    Smartjack's Avatar
    Join Date
    May 2016
    Location
    Naperville, Il
    Posts
    124

    Re: Draining Pool??

    If you mixed a quart of water, with a quart of pool water, and your black dot test says 100, then you have a CYA of 200.

    I am am brand new to this site, and only joined about 2 weeks ago. I got on because of a CYA issue, and mine was at around 600. Even after 2 partial drains, where I got my level into the 200's, I did a 6 times dilution to get my reading (1 part pool, 5 parts tap). But, the pros here helped me through this, and I am now at a CYA of 45!

    You are at the right place for help.

    BTW.....When my CYA was over 600, the pool store told me mine was 151 too.......
    Bruce - (The SmartJack was an invention of mine, and became my nickname)
    Fox Pool 40x27 IG Vinyl, Lagoon Shape, 27,000 gallons, Hayward 300,000 BTU heater
    Hayward 1.5 HP, 2-Speed SuperPump, with Hayward C4025 Cartridge Filter
    Polaris C-310 ORP Controller, modified to pump Liquid Chlorine
    Hayward Phantom, and Aquabot Turbo T-Jet automatic pool cleaners, Taylor K-2006

Posting Permissions

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