Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 19 of 19

Thread: Am I doing the CYA diluted test steps correctly?

  1. Back To Top    #1

    Join Date
    Apr 2017
    Location
    Hillsborough New Jersey
    Posts
    30

    Am I doing the CYA diluted test steps correctly?

    To be sure I wasn't adding tainted water to my test I used a sample of boiled water from my tea kettle, and tap water which is provided by the city I live in and could be chemically treated for purity, and did a CYA test on both of those. Results were zero so I used each of these to do two dilution CYA tests. Pool temp is 61 degrees but both tests I ran I warmed the sample up before adding reagent to where it felt warm on my skin when drops were dripped onto wrist. How am I doing so far?

    Next I filled the sample bottle with 7ml of pool water, and diluted it with each of those clean samples once, shook well, reduced the level to 7ml filled it with reagent up to 14ml mark and tested each sample. Both were over 100.

    Emptied test bottle, refilled with pool water to 7ml, added each zero sample to 14ml, shook, reduced to 7ml, added both zero samples again, shook, and reduced to 7ml, and then added reagent. The results of both of those tests were 60.

    Would I be wrong in my calculations if I said that my CYA level is 120? or is it 180 after 2 dilutions. <personal note, my math skills are 50 years old an weren't all that when I was in school >

    You can laugh at me if you like, at least I can put a smile on someone's face today!!
    Vinyl 18' X 37' IGP 3'/8' deep
    27,400 gallons
    Hayward DE 4800 filter
    Full Sun NO SHADE
    Taylor 2006 test Kit

  2. Back To Top    #2
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    40,883

    Re: Am I doing the CYA diluted test steps correctly?

    If one dilution was still over a hundred that means your cya is greater than 200. So in your second test where you deluded twice that would be a multiple of 4 making your CYA around 240. But there is a huge error bar around that number.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  3. Back To Top    #3

    Join Date
    Jun 2011
    Location
    Long Beach, CA
    Posts
    2,892

    Re: Am I doing the CYA diluted test steps correctly?

    Tap water is fine to use for dilution as it doesn't have any CYA in it, no need to boil it.

    Looks like you need to replace most of the water. Be careful to not drain too much at one time with the vinyl liner.
    16k gal plaster with raised spa, Jandy DEV60 filter, 2 HP 2-speed SHPF Jandy Stealth pump
    Hayward Aqua Rite T-15 SWCG, Jandy LXi 400k BTU NG heater, 350 sq.ft. of Sun Star solar panels, TF-100 Test Kit, Dolphin s300i Cleaner
    Test Kits . Pool Math . Chlorine/CYA Chart . The SLAM Process

  4. Back To Top    #4

    Join Date
    Apr 2017
    Location
    Hillsborough New Jersey
    Posts
    30

    Re: Am I doing the CYA diluted test steps correctly?

    Jason, what did you mean "huge error bar"?
    Vinyl 18' X 37' IGP 3'/8' deep
    27,400 gallons
    Hayward DE 4800 filter
    Full Sun NO SHADE
    Taylor 2006 test Kit

  5. Back To Top    #5
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    20,312

    Re: Am I doing the CYA diluted test steps correctly?

    Quote Originally Posted by Splitshot View Post
    Jason, what did you mean "huge error bar"?
    He's getting all scientific. He just means that the more you dilute, the less accurate you get and your results could be +/- 40 to 60.
    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!

  6. Back To Top    #6

    Join Date
    Apr 2017
    Location
    Hillsborough New Jersey
    Posts
    30

    Draining Vinly pool to correct high CYA

    I realize the danger of draining too much water at once from my pool to replace with fresh water. It would take about 3 days for my pool to fill above skimmer using my garden hose and taking out 30% or 40% of its volume. According to the Pool Math Calculator it says I need to drain 75% because my CYA numbers are so high. I have another thread addressing the CYA accurate dilution test procedure, so I know/feel its right numerically. If I only drain 30%, refill, and then circulate, drain 30% will I achieve the same results?

    Is there a simpler way to drain and refill in one day? Without risking the liner shifting on me?

    EDIT: Splitshot. Keep your posts under one thread. I know it's odd to do it that way but this forum works best when we can see your whole "story"
    Vinyl 18' X 37' IGP 3'/8' deep
    27,400 gallons
    Hayward DE 4800 filter
    Full Sun NO SHADE
    Taylor 2006 test Kit

  7. Back To Top    #7

    Join Date
    Apr 2017
    Location
    Hillsborough New Jersey
    Posts
    30

    Re: Am I doing the CYA diluted test steps correctly?

    Ah, never considered that, thanks for answering so quick. I know why its high, last years battle with algae had me spending a fortune on chemicals and shock per advice from local pool store company. I am ANGRY that I spent so much, and still have to drain my pool and waste water and time to refill it.
    Vinyl 18' X 37' IGP 3'/8' deep
    27,400 gallons
    Hayward DE 4800 filter
    Full Sun NO SHADE
    Taylor 2006 test Kit

  8. Back To Top    #8

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,955

    Re: Am I doing the CYA diluted test steps correctly?

    Is there a simpler way to drain and refill in one day?
    Not sure I understand the question. You don't have the hose capacity to refill in one day anyway, right?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  9. Back To Top    #9

    Join Date
    Apr 2017
    Location
    Hillsborough New Jersey
    Posts
    30

    Re: Am I doing the CYA diluted test steps correctly?

    ahhh, LOL I thought I would get reprimanded for posting a different question in this thread, instead I'm told to keep my questions in the thread, I PROMISE to keep trying to have proper forum etiquette. please have some patience with this old fool

    - - - Updated - - -

    what about those companies that bring a tanker truck to fill pools, is that a bad idea cost wise and vinyl liner wise to use them? It would take two trucks and be about $475 each load to fill pool back up from 75% empty.
    Vinyl 18' X 37' IGP 3'/8' deep
    27,400 gallons
    Hayward DE 4800 filter
    Full Sun NO SHADE
    Taylor 2006 test Kit

  10. Back To Top    #10

    Join Date
    Apr 2017
    Location
    Hillsborough New Jersey
    Posts
    30

    Re: Am I doing the CYA diluted test steps correctly?

    And how would I know if the water they are giving me is free of CYA
    Vinyl 18' X 37' IGP 3'/8' deep
    27,400 gallons
    Hayward DE 4800 filter
    Full Sun NO SHADE
    Taylor 2006 test Kit

  11. Back To Top    #11
    Mod Squad YippeeSkippy's Avatar
    Join Date
    Jan 2012
    Location
    'burbs of Augusta, Georgia
    Posts
    8,586

    Re: Am I doing the CYA diluted test steps correctly?

    tap water, faucet water, fire hydrant water, lake water and the like do not have CYA in them because that is a pool stabilizer chemical that only gets put in to swimming pools.

    So unless the tanker sucked up a swimming pool of water to in turn deliver it to you... you're going to be fine.

    Maddie
    Maddie :) 12K 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.
    Skippy's Pool Cooler --> Skippy's New Fountain Our Build --> Our Pool Solved Our Sloping Yard

  12. Back To Top    #12
    DeanP66's Avatar
    Join Date
    Mar 2014
    Location
    San Jose, CA
    Posts
    703

    Re: Am I doing the CYA diluted test steps correctly?

    Awfully costly if you ask me. How about a 50% drain and refill and run another CYA test to see where you're at? If you're still too high, do it one more time. I filled my whole pool (20k Gallons) in about 18 hours with just a garden hose, so it shouldn't take you multiple days. If you have a second hose and water outlet to use, that could speed things up even more.
    Pool size: 20,000 Gallon Plaster Pool, Pump: Hayward Tristar VS SP3202VSP, Filter: Pentair Clean and Clear Plus 320
    Polaris 280 Pressure side cleaner, Solar cover, Pentair Amerilite LED pool light, Taylor K-2006C test kit
    Location: San Jose, CA

  13. Back To Top    #13
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    40,883

    Re: Am I doing the CYA diluted test steps correctly?

    You need about 2 50% drains. That should take your cya down to about 60 ppm
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  14. Back To Top    #14

    Join Date
    Apr 2017
    Location
    Hillsborough New Jersey
    Posts
    30

    Re: Am I doing the CYA diluted test steps correctly?

    Here in somerset county NJ we have shale, which when it rains the water table, hydrostatic pressure is brutal. I have seen a floating liner and do not want that to happen, but you all have helped me so I should just put on my big boy pants and steel myself to the task. I have never drained that much out of my pool, so I am guessing just move my pump handle to waste and dump the water. I may need to check with local authorities to see if its okay to send that to the sewer. Best to check before they come and say I've broken some rule about water use. I just don't see how connecting two hoses to the same system with the same diameter water lines and pressure speeds up the process. Mostly it falls off to a trickle if you tax it that much. only 1" water lines in my home.

    - - - Updated - - -

    Just checked my last water bill, 4000 gallons of water and paid $42.00. If all goes well it will be a rewarding and enlightening experience.
    Vinyl 18' X 37' IGP 3'/8' deep
    27,400 gallons
    Hayward DE 4800 filter
    Full Sun NO SHADE
    Taylor 2006 test Kit

  15. Back To Top    #15
    DeanP66's Avatar
    Join Date
    Mar 2014
    Location
    San Jose, CA
    Posts
    703

    Re: Am I doing the CYA diluted test steps correctly?

    Make sure you shut off your skimmer or else, once the water level gets below it, your pump will start to suck air and lose prime. If you can't completely close off the skimmer like in my pool, you can either buy or rent a utility pump from Home Depot or Harbor Freight so you don't have to run your pool equipment to drain.
    Pool size: 20,000 Gallon Plaster Pool, Pump: Hayward Tristar VS SP3202VSP, Filter: Pentair Clean and Clear Plus 320
    Polaris 280 Pressure side cleaner, Solar cover, Pentair Amerilite LED pool light, Taylor K-2006C test kit
    Location: San Jose, CA

  16. Back To Top    #16

    Join Date
    Sep 2016
    Location
    Escondido/CA
    Posts
    641

    Re: Am I doing the CYA diluted test steps correctly?

    Maybe use the tarp method so you can change out most of the water, without emptying the pool.
    Jon -- 28kgal, IG, AquaBright, Attached Spa, ~1990, Quad DE 80, Easytouch8, IntelliFloVS-3050, Intellichlor60, IntelliPh, Dolphin DX6, City Water, K-2006/TF-100, SpeedStir, SampleSizer, San Diego, CA

  17. Back To Top    #17

    Join Date
    Sep 2016
    Location
    Escondido/CA
    Posts
    641

    Re: Am I doing the CYA diluted test steps correctly?

    By this I mean, get a piece of plastic that is much larger than your pool, and put it over the top once you get a sump pump started draining. Now start filling on top of the plastic while the sump pump drains below it.

    If the tarp is large enough, it will sink down but will prevent the new water from mixing with the old water until you pull out the tarp at the end.

    Then, there is no risk to floating as long as you match the draining rate with the fill rate.
    Jon -- 28kgal, IG, AquaBright, Attached Spa, ~1990, Quad DE 80, Easytouch8, IntelliFloVS-3050, Intellichlor60, IntelliPh, Dolphin DX6, City Water, K-2006/TF-100, SpeedStir, SampleSizer, San Diego, CA

  18. Back To Top    #18

    Join Date
    Apr 2017
    Location
    Hillsborough New Jersey
    Posts
    30

    Re: Am I doing the CYA diluted test steps correctly?

    That's pretty tricky Jon. I have a solid pool cover, 20 X 40 it would work but only until I got down 2' since my pool is 18 x 37 how big a tarp would I need? I like the idea because I usually have to pump off the cover and fill up the pool at the same time, this is the process in reverse. Solution was right in front of me, just didn't recognize it. I use a Little Giant submersible sump pump to clear my cover in the spring, powerful little bugger too, using pool size hose, 1 1/2" it really can clear out water. usually faster than I can fill the pool. So how many time can I say thanks to you guys?? Does it ever get old? May take a month but I think that could be my best solution, after each fill test and see if I am reducing CYA. May not get to slam until 4th of July

    - - - Updated - - -

    Just had an afterthought, can I still run the filter? I have two skimmers and a bottom drain. Will have to see if I can close both surface skimmer off at the same time, I know I can do each separately that's how I vacuum.
    Vinyl 18' X 37' IGP 3'/8' deep
    27,400 gallons
    Hayward DE 4800 filter
    Full Sun NO SHADE
    Taylor 2006 test Kit

  19. Back To Top    #19
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    40,883

    Re: Am I doing the CYA diluted test steps correctly?

    Best way to say thanks is to become a supporter and help us keep the lights on so we can help other people.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

Posting Permissions

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