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Thread: CYA level readings

  1. Back To Top    #1

    Join Date
    Jun 2014
    Location
    Fulton, ms
    Posts
    32

    CYA level readings

    I am having trouble determining my CYA level and thus shock level.

    The first results:

    6/6/14
    TA 90
    Ph 7.8
    Cya 100
    Fc 0
    Tc 0

    Was instructed to put in 15 lbs of shock and wait 30 mins and do 20oz of algae dies, then put in tablets


    Next test
    6/9/14
    Ta 80
    Ph 7.2
    Cya 100
    Fc 0
    Tc 0
    Copper 0.5

    Was instructed to put in a whole bottle of clear and perfect in skimmer while on recirculate for two hours then leave pump off for 48 hours..... Then once you can see bottom , vacuum to waste......pool never cleared up, still green cloudy


    Last night I used my own new test strips

    6/11/2014
    Ph ~7
    Fc 0
    Tc 0
    Cya 0-50 ish

    I went with 30 cya and added 5 gallons of 8.25% bleach over returns, waited 30 mins and tested again

    Ph ~7
    Fc 0-1 maybe
    Tc 10
    Cya 0-50

    Put in 5 more gallons of 8.25% bleach over returns.


    Today 6/12/14, I took three samples to the pool store.

    #1 100% pool water
    Ta 40
    Ph 6.8
    Cya 100
    Fc 1
    Tc 1
    Copper 0.5

    #2 50/50 pool and tap water
    Ta 40
    Ph 7.5
    Cya 100
    FC 1
    Tc 1
    Copper 0.5

    #3 1/4 pool water , 3/4 tap water
    Ta 100
    Ph 7.6
    Cya 100
    Fc 0
    Tc 0
    Copper 0


    Sample #1 was instructed to put 20 lbs sodium, wait 4 hours, 12 lbs shock. And then tabs ( have not done this yet)

    From my understanding, the cya level in the pool would have to be >=400 according to test #3 since I diluted it with 3/4 tap water...

    My little test strips say the cya level is between 0-50 though. What should I do?

  2. Back To Top    #2
    Mod Squad JohnT's Avatar
    Join Date
    Apr 2007
    Location
    SW Indiana
    Posts
    9,085

    Re: CYA level readings

    Welcome to TFP!

    What should I do?
    Since you can see that pool store testing is no better than guessing, I'd recommend a good test kit. It will pay for itself in no time.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

  3. Back To Top    #3

    Join Date
    May 2013
    Location
    Bay City, Michigan
    Posts
    283

    Re: CYA level readings

    Stop using test strips they are awful.. Stop using pool store testing, it's not much better and it has the side effect of getting sold on a bunch of garbage you don't need. Stop buying everything the pool store tries to sell you, you could have bought your own test kit with what you've spent at the store.

    Buy a TF-100, do your own testing. Read pool school and learn about pool water maintenance.

    Receive your TF-100 test kit, and post your results from that test.

    - - - Updated - - -

    Quote Originally Posted by Jdaher View Post
    Was instructed to put in 15 lbs of shock and wait 30 mins and do 20oz of algae dies, then put in tablets
    Are you able to find out what the active ingredient in your 15 lbs of shock was? The tablets are making your CYA higher every time you use them.
    12500 gallons, 24 foot round above ground
    Hayward Sand filter, Pentair OptiFlo 1HP 2-Speed pump

  4. Back To Top    #4

    Join Date
    Jun 2014
    Location
    Fulton, ms
    Posts
    32

    Re: CYA level readings

    Quote Originally Posted by scott.MI View Post
    Are you able to find out what the active ingredient in your 15 lbs of shock was? The tablets are making your CYA higher every time you use them.
    Yes, it was trichlor. We have stopped using it since I have been reading tfp and that is why I used the 10 gallons of bleach last time. We just picked up a bucket of cal- hypo to use in the future.

  5. Back To Top    #5

    Join Date
    May 2013
    Location
    Bay City, Michigan
    Posts
    283

    Re: CYA level readings

    Quote Originally Posted by Jdaher View Post
    Yes, it was trichlor.
    Ouch, there is another 33 CYA increase. The single best thing you can do for yourself is to get your own test kit, do your own testing. Not only to get clear water, but the amount of money it will save you from not getting pool stored.

    If you do order a test kit, and while you wait...I would seriously consider doing a partial drain while you wait to receive it, if your water cost is not outrageous. It is very likely you are well over 100.
    12500 gallons, 24 foot round above ground
    Hayward Sand filter, Pentair OptiFlo 1HP 2-Speed pump

  6. Back To Top    #6

    Join Date
    Jun 2014
    Location
    Fulton, ms
    Posts
    32

    Re: CYA level readings

    Test kit has been ordered. The tf-100 will be here Monday or Tuesday.

    This morning I got three sample bottles and took a sample to each of the three pool stores in my area. The sample water was taken exactly the same at the same time. All three pool store tests were done within an hour of each other.

    Test #1
    TC 10
    FC 10
    TA 120
    PH 7.5
    CYA 20

    Test #2
    TC 3
    FC 3
    TA 100
    PH 7.6
    CYA 100
    Copper 0.5

    Test #3
    TC 0.14
    FC 1.25
    TA 50
    PH 7.2
    CH 10
    CYA 0


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