Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 13 of 13

Thread: CYA off the charts

  1. Back To Top    #1

    Join Date
    Jul 2015
    Location
    San Marcos, CA
    Posts
    110

    CYA off the charts

    Got my Taylor K2006 last Friday and got to prepping for a Saturday pool party. The pool had been covered for three days and I was alarmed to see so much green on the floor. I filled a pitcher with water for testing after I finished vacuuming, then set about cleaning up. It was surprising how easy the algae vacuumed up. Didn't need much brushing.

    Once everything was clean it was time to break out the kit. I first took readings with the old kit using the pitcher water and then a fresh sample to see if there were any difference; I didn't see any.
    Old Kit
    Readings
    Date
    Temp
    7/10/15
    87
    FC
    3.0 - 4.0
    pH
    7.6 - 7.8

    New Kit
    Readings
    Date
    Temp
    7/10/17
    87
    FC
    8ppm
    CC
    .8 ppm
    pH
    7.4
    TA
    240
    CYA
    one bajillion


    I've got no idea what my CYA levels are. I filled the bottle to the 7mL line with water, then added R-0013 Cyanuric Acid Reagent to bring it to 14 mL, shook it real good, and started pouring it into the smaller of the integrated vials. I don't think I managed to put more than a half inch in before the black dot disappeared. It appears the markings are a logarithmic scale, so I'm guessing my CYA must be 1000. Not sure I believe this since I dumped about half the water a year or so ago.

    Now what?
    Attached Images Attached Images
    16 x 32 IG plaster pool, 23k gallons, built 1992, DE filter, Pentair VS pump, IoThyngs controller, Taylor 2006 test kit, SoCal water restrictions
    Newbies with green pools, see SLAM and Recommended Test Kits. My company: IoThyngs

  2. Back To Top    #2

    Join Date
    Jun 2015
    Location
    N Tonawanda, NY
    Posts
    469

    Re: CYA off the charts

    Try mixing 2oz pool water with 20oz tap water. Mix & retest CYA. Multiply reading by 10.
    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
    TF-100XL Test Kit with SpeedStir

  3. Back To Top    #3

    Join Date
    Jul 2015
    Location
    San Marcos, CA
    Posts
    110

    Re: CYA off the charts

    The instructions are:
    1. Rinse and fill CYA dispensing bottle (#9191) to 7 mL mark
    with water to be tested.
    2. Add R-0013 to 14 mL mark. Cap and mix for 30 seconds.
    3. Slowly transfer cloudy solution to small comparator tube
    until black dot on bottom just disappears when viewed
    from top.
    4. Read tube at liquid level on back of comparator block.

    Do you mean I should mix up the 2/20 ml solution, then pour that in to the 7mL mark?
    16 x 32 IG plaster pool, 23k gallons, built 1992, DE filter, Pentair VS pump, IoThyngs controller, Taylor 2006 test kit, SoCal water restrictions
    Newbies with green pools, see SLAM and Recommended Test Kits. My company: IoThyngs

  4. Back To Top    #4
    Mod Squad zea3's Avatar
    Join Date
    Jul 2009
    Location
    Houston, Texas
    Posts
    9,200

    Re: CYA off the charts

    Yes, he wants you to use a diluted sample to get an idea how high the CYA may be. It won't be as accurate as an undiluted sample, but it will get you in the ballpark. What have you been using to chlorinate the pool?
    TFP Moderator
    Helpful links: TF Test Kits,TFP Pool School, PoolMath
    Vogue 21' round AG, Pentair 1 hp 2 speed pump, 36 sq ft DE filter, Hayward S180T 150# sand filter, Houston, Texas
    Love TFP? Become a
    TFP Supporter!

  5. Back To Top    #5

    Join Date
    Jul 2015
    Location
    San Marcos, CA
    Posts
    110

    Re: CYA off the charts

    That makes sense. Would it be better to use bottled water instead of tap in case the city water has high CYA too?

    I've been using chlorine from Home Depot for the last year and a half since jettisoning my pool guy. He was having a hard time getting the balance right and ultimately suggested we dump and refill half the water. Once that was done he was able to get things under control, but that was about the same time I decided I didn't need to pay someone for the service. Prior to that we used chlorine tablets from Costco exclusively.
    16 x 32 IG plaster pool, 23k gallons, built 1992, DE filter, Pentair VS pump, IoThyngs controller, Taylor 2006 test kit, SoCal water restrictions
    Newbies with green pools, see SLAM and Recommended Test Kits. My company: IoThyngs

  6. Back To Top    #6
    lefty51's Avatar
    Join Date
    May 2015
    Location
    East of Royals country western MO
    Posts
    451

    Re: CYA off the charts

    let's see how good my math is. 23K pool --- CYA = 1 bajillion........... I think you need to replace 193,745 gals to bring it down to about 40 ...give or a take a thousand gal
    Si -central Mo. 32' x 16' -- 3'4" to 6' deep Vinyl liner - 16,500 Gals : Triton II filter -Duraglass 2 hp pump - 1 speed : SI-30 salt generator
    TF-100 with speedstir

  7. Back To Top    #7

    Join Date
    Jun 2015
    Location
    N Tonawanda, NY
    Posts
    469

    Re: CYA off the charts

    Either bottled or tap should be fine, neither should have CYA in it.
    Is the chlorine from Home Depot liquid, tabs, granular?
    16' x 34' vinyl in ground - 16,500 gal.
    Hayward EC-75 DE filter with Hayward 1hp Super Pump
    TF-100XL Test Kit with SpeedStir

  8. Back To Top    #8

    Join Date
    Sep 2013
    Location
    Connecticut
    Posts
    728

    Re: CYA off the charts

    Drinking water (tap water) does not have CYA in it. However, no harm in using bottled water if you prefer.

    The 1 to 10 dilution is pretty extreme. The initial suggestion on the forum is usually to try 1:1 or 2:1 plain water to pool water
    to start with. Once you have your water mix, you use a sample from that mixed water to run the CYA test (just as you did before with your pool water sample).

    If your CYA is really high, as yours is, you can save on the CYA reagent by not using the full 7 ml. The main thing is to get precisely equal parts of the tested water and the reagent. In other words, since you know that the dot disappears with half an inch of the water/reagent mix in the CYA tube, you could try (for example) 3 ml of water mixed with 3 ml of reagent. However, for this to work, you need to measure accurately. A syringe from the pharmacy works well to meter out a few ml of liquid.

    I would only bother with this if you are short on CYA reagent, as you would be if you are using the K-2006 (typing inside the reply box here, I don't remember which kit you have). If you have the TF-100, I think you have more of the reagent to start with.

    If you do 1:1 dilution, multiply result by 2; if 2:1, multiply result by 3; if 10:1, multiply result by 11.
    18' x 48" ring top pool (Summer Escapes); 5500 gallons; set up June - October, stored during winter; Intex 2500 gph pump (B size cartridge filter) Hayward 21" sand filter + 1.5 hp single speed Powerflo Matrix pump (upgrade October 2016) *** K-2006 test kit, refills from tftestkits

  9. Back To Top    #9

    Join Date
    Jul 2015
    Location
    San Marcos, CA
    Posts
    110

    Re: CYA off the charts

    Okay, put 2 oz pool water into 8 oz tap water for a 1:5 dilution. Added 7 ml mixture to 7 ml reagent and came up with a reading of 40 ppm. That time 5 gives me a CYA of 200. FC is 5 ppm, CC is 0. Not a happy camper.
    16 x 32 IG plaster pool, 23k gallons, built 1992, DE filter, Pentair VS pump, IoThyngs controller, Taylor 2006 test kit, SoCal water restrictions
    Newbies with green pools, see SLAM and Recommended Test Kits. My company: IoThyngs

  10. Back To Top    #10

    Re: CYA off the charts

    Quote Originally Posted by Amail View Post
    Okay, put 2 oz pool water into 8 oz tap water for a 1:5 dilution. Added 7 ml mixture to 7 ml reagent and came up with a reading of 40 ppm. That time 5 gives me a CYA of 200. FC is 5 ppm, CC is 0. Not a happy camper.
    I am assuming you are under water restrictions at this time?

    - - - Updated - - -

    If you are unable to drain and refill you must keep the FC high enough for your CYA. It can be done, I did it several years ago. Here is the Chlorine/CYA chart

    http://www.troublefreepool.com/conte...rt-slam-shock/

    - - - Updated - - -

    Quote Originally Posted by Amail View Post
    Got my Taylor K2006 last Friday and got to prepping for a Saturday pool party. The pool had been covered for three days and I was alarmed to see so much green on the floor. I filled a pitcher with water for testing after I finished vacuuming, then set about cleaning up. It was surprising how easy the algae vacuumed up. Didn't need much brushing.

    Once everything was clean it was time to break out the kit. I first took readings with the old kit using the pitcher water and then a fresh sample to see if there were any difference; I didn't see any.
    Old Kit
    Readings
    Date
    Temp
    7/10/15
    87
    FC
    3.0 - 4.0
    pH
    7.6 - 7.8

    New Kit
    Readings
    Date
    Temp
    7/10/17
    87
    FC
    8ppm
    CC
    .8 ppm
    pH
    7.4
    TA
    240
    CYA
    one bajillion


    I've got no idea what my CYA levels are. I filled the bottle to the 7mL line with water, then added R-0013 Cyanuric Acid Reagent to bring it to 14 mL, shook it real good, and started pouring it into the smaller of the integrated vials. I don't think I managed to put more than a half inch in before the black dot disappeared. It appears the markings are a logarithmic scale, so I'm guessing my CYA must be 1000. Not sure I believe this since I dumped about half the water a year or so ago.

    Now what?
    Been there before...
    21,100 IG Vinyl
    Hayward Pump
    Sand Filter
    TFPC
    Taylor K-2006 Kit

  11. Back To Top    #11

    Join Date
    Jul 2015
    Location
    San Marcos, CA
    Posts
    110

    Re: CYA off the charts

    Quote Originally Posted by Mike1162 View Post
    Either bottled or tap should be fine, neither should have CYA in it.
    Is the chlorine from Home Depot liquid, tabs, granular?
    Sorry, missed your post! I'm using liquid chlorine, 10% hypochlorite.
    16 x 32 IG plaster pool, 23k gallons, built 1992, DE filter, Pentair VS pump, IoThyngs controller, Taylor 2006 test kit, SoCal water restrictions
    Newbies with green pools, see SLAM and Recommended Test Kits. My company: IoThyngs

  12. Back To Top    #12

    TFP Guide

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

    Re: CYA off the charts

    Any idea where all the CYA came from? Any pucks in a auto dispenser? Any 'shock'?
    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

  13. Back To Top    #13

    Join Date
    Jul 2015
    Location
    San Marcos, CA
    Posts
    110

    Re: CYA off the charts

    Bumping one of my old threads. In answer to padeader, yes, I used to use pucks all the time. And 'shock' too. That was before I left the dark side, but by then the damage was done. I'm still struggling with high CYA levels, but will drain and refill in the fall so I can get this water balanced nice and tidy. May even go with SWG by then, but I've got more researching to do first.
    16 x 32 IG plaster pool, 23k gallons, built 1992, DE filter, Pentair VS pump, IoThyngs controller, Taylor 2006 test kit, SoCal water restrictions
    Newbies with green pools, see SLAM and Recommended Test Kits. My company: IoThyngs

Posting Permissions

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