Become a TFP Supporter Pool Math Forum Rules Pool School
Page 1 of 2 12 LastLast
Results 1 to 20 of 27

Thread: CYA of 100...

  1. Back To Top    #1

    Join Date
    Jul 2012
    Location
    Winter Haven, FL
    Posts
    103

    CYA of 100...

    Been using tablets and wondering why my pool is still green with chlorine in it. I test CYA tonight and I'm at 100 after 4 tests. Is my only option draining at this point? Wondering how long it would take to naturally lower itself. In Florida tons of rain. My wife was talked into buying 50 pound bucket of tablets at the pool store so I think I just over used tablets causing my CYA to slowly rise without me catching it. Won't be using any more tabs til I get the # down.
    #s are spot on I've got my fc up to 35 which was a task so I hate to just dump out all that water! Any ideas? Thanks.

  2. Back To Top    #2
    Isaac-1's Avatar
    Join Date
    May 2010
    Location
    SW Louisiana
    Posts
    6,711

    Re: CYA of 100...

    CYA breaks down at a very slow rate, so slow that your only practical option is water replacement. In very warm (104-106 degree F) hot tub like conditions you may find CYA breaking down at a rate of about 5-10% per month, at typical pool temperatures it is MUCH slower.

    Ike

    p.s. rain only helps if you have overflow, if the rain is just making up evaporated water then CYA will remain the same as it does not evaporate, it just gets concentrated in the remaining water then replacement water either rain or tap just dilutes it back to the original level.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

  3. Back To Top    #3

    Join Date
    Jul 2012
    Location
    Winter Haven, FL
    Posts
    103

    Re: CYA of 100...

    I was worried that would be my answer. I need to wait til the chlorine dilutes to drain too. Oh well!

  4. Back To Top    #4

    TFP Guide

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

    Re: CYA of 100...

    The trick is to lower the water, before the next rain. The more CYA laden water you can get out, the more effective the rain will be.
    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

  5. Back To Top    #5

    Join Date
    Jul 2012
    Location
    Winter Haven, FL
    Posts
    103

    Re: CYA of 100...

    So lets see. I have a full 27k gallons and 100 CYA... I need to drain off maybe about 4000 gallons? to get me to 80? I think I can manage at 80 til it lowers a little.
    16x32 27k gal oval gunite pool, 24-inch Hayward sand filter, 1HP pump

  6. Back To Top    #6


    TFP Guide

    kcindc's Avatar
    Join Date
    Sep 2011
    Location
    Fairfax, VA
    Posts
    1,272

    Re: CYA of 100...

    The CYA test maximum is 100. It is best to dilute the sample with 50% tap water and you can then double the result. If it is still higher, you will need to keep diluting, say 25% pool water and 70% tap water.

    Your CYA could very well be much, much higher than 100. Which test kit are you using for your results? We only trust the Taylor K-2005 and the TF-100.

    Because your water is green, you will want the CYA lower than 80. I would shoot for a CYA of no more than 50 which will have a SLAM FC of 20.

    SLAM: Pool School - SLAM - Shock Level And Maintain

    Chlorine CYA Chart: Pool School - Chlorine / CYA Chart
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

  7. Back To Top    #7

    Join Date
    Jul 2012
    Location
    Winter Haven, FL
    Posts
    103

    Re: CYA of 100...

    I see. I'm using the TF-100 I bought from here. I will try diluting tonight. Gosh I hope it's not higher than 100. UGH! I hate the thought of dumping pool water out! Never had this issue before so it's a little disheartening.

    On the plus side, the plaster is super clean. There is just a green cloud that keeps sitting on top of the plaster. It shouldn't be a hard SLAM once my CYA is under control.
    16x32 27k gal oval gunite pool, 24-inch Hayward sand filter, 1HP pump

  8. Back To Top    #8
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: CYA of 100...

    Just for the record, TFP doesn't sell test kits. The TF-100 is sold by TFTestkits.net.

    Here is how to do the extended test for above 100, Pool School - Extended Test Kit Directions
    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

  9. Back To Top    #9

    Join Date
    Jul 2012
    Location
    Winter Haven, FL
    Posts
    103

    Re: CYA of 100...

    So I ran the diluted tap/pool water test. Did it multiple times. The result was 50. So it appears I am right at 100. Which means I will need to drain half the pool to get to 50 CYA I assume. I am waiting til Friday to do it due to work constraints. Wish I could do it earlier as I hate seeing my pool further get green and I'm not throwing any more chlorine at it lol. Thanks for the responses guys.
    16x32 27k gal oval gunite pool, 24-inch Hayward sand filter, 1HP pump

  10. Back To Top    #10


    TFP Guide

    kcindc's Avatar
    Join Date
    Sep 2011
    Location
    Fairfax, VA
    Posts
    1,272

    Re: CYA of 100...

    You should try to keep you FC at SLAM levels to keep it from getting worse. Trust me, it can get worse, especially with the heat and the sun's strength in Florida.
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

  11. Back To Top    #11
    Isaac-1's Avatar
    Join Date
    May 2010
    Location
    SW Louisiana
    Posts
    6,711

    Re: CYA of 100...

    You can add chlorine, it just needs to be in the form of liquid chlorine / bleach (NO DRY PRODUCTS)
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

  12. Back To Top    #12
    kellyfair's Avatar
    Join Date
    Jun 2016
    Location
    Tampa, FL
    Posts
    173

    Re: CYA of 100...

    Quote Originally Posted by lelandapple View Post
    Been using tablets and wondering why my pool is still green with chlorine in it. I test CYA tonight and I'm at 100 after 4 tests. Is my only option draining at this point? Wondering how long it would take to naturally lower itself. In Florida tons of rain. My wife was talked into buying 50 pound bucket of tablets at the pool store so I think I just over used tablets causing my CYA to slowly rise without me catching it. Won't be using any more tabs til I get the # down.
    #s are spot on I've got my fc up to 35 which was a task so I hate to just dump out all that water! Any ideas? Thanks.
    I was you, just a few weeks ago. Bite the bullet and drain. You will not regret it.
    Kelly, Tampa FL
    15' by 4' Intex above ground metal frame, about 5300 gallons
    Intex 120V Krystal Clear Sand Filter Pump & Saltwater System CG-28679 with E.C.O.
    TF100 Kit and Speedstir
    Intex Auto Cleaner - works great!

  13. Back To Top    #13

    Join Date
    Jul 2012
    Location
    Winter Haven, FL
    Posts
    103

    Re: CYA of 100...

    Quote Originally Posted by kcindc View Post
    You should try to keep you FC at SLAM levels to keep it from getting worse. Trust me, it can get worse, especially with the heat and the sun's strength in Florida.
    Yeah I know. It still has a lot of chlorine in it, but I just can't get it up to the FC it needs to be with 100 CYA... I have been adding liquid only too but I ran out yesterday so no more til I stock up before the refill. I might drain it tonight so I can speed things up. I hate sitting and waiting lol.
    16x32 27k gal oval gunite pool, 24-inch Hayward sand filter, 1HP pump

  14. Back To Top    #14

    Join Date
    Jul 2012
    Location
    Winter Haven, FL
    Posts
    103

    Re: CYA of 100...

    Sooo.. I will be draining into the road (yes its legal where I live) theres a sewer drain right down the street. Just wondering how I can optimize my drain due to my limited hours off of work (I work way too much). Water hoses and will be using one of my old Kreepy Krauly long hoses as well. Any other tips or tricks I'm not thinking of? I couldn't find my drain pipe near my house that I am supposed to have.. That would be too handy. Thought about buying a 50ft backwash hose too, just because I don't have one and could come in handy later.
    16x32 27k gal oval gunite pool, 24-inch Hayward sand filter, 1HP pump

  15. Back To Top    #15

    Join Date
    Jun 2014
    Location
    Houston, Texas
    Posts
    447

    Re: CYA of 100...

    can you rent a pump? I know when they drained my pool they used pumps...
    19k SW IG
    Wet Edge pebble tech = new 5/16 (replaster)
    Hayward variable speed pump (new 6/17) /Shark for cleaning
    New - filled 10/18/14 - TFP 100 test kit

  16. Back To Top    #16

    Join Date
    Jul 2012
    Location
    Winter Haven, FL
    Posts
    103

    Re: CYA of 100...

    Quote Originally Posted by DMS2014 View Post
    can you rent a pump? I know when they drained my pool they used pumps...
    Yeah the pool company who did mine did not use a pump. They just came the day before and ran a big thick hose and siphoned and came back 24 hrs later. But the pump might not be a bad idea. I'll check local stores.
    16x32 27k gal oval gunite pool, 24-inch Hayward sand filter, 1HP pump

  17. Back To Top    #17


    TFP Guide

    kcindc's Avatar
    Join Date
    Sep 2011
    Location
    Fairfax, VA
    Posts
    1,272

    Re: CYA of 100...

    Do you have a waste or backwash option on your filter valve? If so, can you isolate the plumbing so that you only pull from the main drain?

    If not, you can rent a pump from HD. You can check here for availability: Submersible Pump 2" Rental - The Home Depot
    Karen
    33K IG w spa plaster, Pentair 1HP Whisperflo, DE Filter, SWG CircuPool RJ-60, Dolphin Triton Plus, Raypak Dig 336K BTU, TF-100.
    Pool Math Chlorine / CYA Chart SLAM - Shock Level And Maintain
    2017 replaster/retile

  18. Back To Top    #18

    Join Date
    Jul 2012
    Location
    Winter Haven, FL
    Posts
    103

    Re: CYA of 100...

    Quote Originally Posted by kcindc View Post
    Do you have a waste or backwash option on your filter valve? If so, can you isolate the plumbing so that you only pull from the main drain?

    If not, you can rent a pump from HD. You can check here for availability: Submersible Pump 2" Rental - The Home Depot
    I tried to do a manual siphon last night as I've done it before with success. Well I was having some problems so I gave up on that lol. I am renting a pump tonight I hope. Thanks for that link!!! It's available down the street from me. Woohoo!
    16x32 27k gal oval gunite pool, 24-inch Hayward sand filter, 1HP pump

  19. Back To Top    #19

    Join Date
    Jul 2012
    Location
    Winter Haven, FL
    Posts
    103

    Re: CYA of 100...

    Well here I am nearly a week later. I drained the pool 5 days ago, down to 50 CYA now. Pretty happy with that, ready to tacke this algae... However.. I think I have mustard algae. I have done some searching on the forums and when I scrub the algae it is like a cloud when I scrub it off.

    My pool is still green after running for 4 days solid and putting one jug of 2.5 gallons of 12% liquid chlorine daily. It is slowly clearing, but goodness my power bill is going to be high. at 50 CYA, I will have to do a very high shock process of 29 FC...

    I have never had so much trouble with my pool before now, it is truly frustrating. I had a renovation done about a year ago on it and I will never let it get even slightly green again if it is this much work to restore it to blue. I am about to get hit by a tropical storm here in Florida which will definitely overflow my pool causing my CYA to go down perhaps. Maybe if I am at 40 post-TS I can handle the yellow mustard shock process easier. Thanks for letting me vent

    my numbers:
    CYA 50
    TA 140
    P.H 7.4
    FC 29 (not 100% accurate as I poured before work this AM and didn't do a check before leaving, but it's definitely very high)
    16x32 27k gal oval gunite pool, 24-inch Hayward sand filter, 1HP pump

  20. Back To Top    #20

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

    Re: CYA of 100...

    SLAM level for a CYA of 50 is 20. Pool School - Chlorine / CYA Chart

    How many times per day are you testing and adding? Are you brushing at least once a day?
    32K gallon Plaster - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart

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
  •