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Thread: I finally did it!!!

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    I finally did it!!!

    Yup, I did it, I actually used my Taylor K-2206 kit and it made sense - man am I slow at this........
    Here are my numbers, the TA seems high to me and I don't understand how to lower that one - it's been low according to the pool store and I have been adding baking soda...

    FC 4.5
    CC 1
    TA 200
    CYA 85
    PH looks like in the middle of 7.4 and 7.6

    CC - I need to shock perhaps? I have been doing my regular stuff with the Simplicity tabs (gonna use em up) and then when we shock (rarely) it has been with CalHypo.
    I looked at Jason's calculator but it doesn't seem to say how to lower TA or how much to shock.
    Appreciate your advise folks.............but i am so excited to have actually given it a try!
    18 ft.52" Round Atrium AG -7600 gallons, Sand Filter, Vinyl liner, Royal Entrance Steps, 80 lbs.solarsalt

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    Re: I finally did it!!!

    Quote Originally Posted by waterbug
    Yup, I did it, I actually used my Taylor K-2206 kit and it made sense - man am I slow at this........
    Here are my numbers, the TA seems high to me and I don't understand how to lower that one - it's been low according to the pool store and I have been adding baking soda...

    FC 4.5
    CC 1
    TA 200
    CYA 85
    PH looks like in the middle of 7.4 and 7.6

    CC - I need to shock perhaps? I have been doing my regular stuff with the Simplicity tabs (gonna use em up) and then when we shock (rarely) it has been with CalHypo.
    I looked at Jason's calculator but it doesn't seem to say how to lower TA or how much to shock.
    Appreciate your advise folks.............but i am so excited to have actually given it a try!
    Waterbug,

    Yes, your first priority is to shock your pool. You need to bring your FC up to at least twenty for it to be effective. You don't post a Calcium Hardness number so I have to assume shocking with Cal-hypo is fine.

    The tabs are causing your CYA to be driven to high which will, in turn, cause you to use more and more chlorine. I suggest you give them to a neighbor or someone who's CYA is low. I know noone likes to waste money, but continuation of the tabs is gonna' cost you a lot more, sooner or later.

    pH is perfect. Alk is high (stop adding baking soda...it increases Alk) but focus on shocking and keeping your CYA low before you try to adjust Alk
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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  3. Back To Top    #3
    JasonLion's Avatar
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    With a CC of 1 you should shock the pool. For your pool that means bringing the FC up to 20.

    After you take care of the CC: You lower TA by lowering PH to between 7.0 and 7.2 with acid and then aerating the pool. When the PH gets up to 7.8 you repeat as many times as needed to get TA where you want it. The acid lowers the PH and the TA, and then aerating raises the PH without raising the TA.

    With a CYA of 85 you want to keep FC between 5 and 10, so you are a little low.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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  4. Back To Top    #4

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    thanks for the help! I will go shock the pool - cal hypo should be okay as the calcium hardness is on the low side at 180.

    Now ifor the stupid newbie questions, if I should lower the CYA by dumping at least one third of the pool and then adding water, would this lower the TA as well?
    18 ft.52" Round Atrium AG -7600 gallons, Sand Filter, Vinyl liner, Royal Entrance Steps, 80 lbs.solarsalt

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    Yes, your TA will be lowered as well IF your fill water is lower in TA. If it's from a municipal water source, then the fill water is probably not high in TA, but it might not be that low. My tap water has a TA of 80, for example. Your Calcium Hardness (CH) will get lower as well -- again, assuming that your fill water is low in CH. If it's not well water, then it is probably low in CH -- mine is 50 -- but this varies across the country.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
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    YOu might want to test the TA of your fill water. I have seen fill water with TA as high as about 250 ppm (well water) in this part of the country (N. Fl.)

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    Will do, I certainly could use the practice with testing! Thanks folks.
    18 ft.52" Round Atrium AG -7600 gallons, Sand Filter, Vinyl liner, Royal Entrance Steps, 80 lbs.solarsalt

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    Well our water is TA of 50 so we emptied a bit more than 1/3 of the pool this morning. Currently refilling and then will let everything circulate and then redo testing tonight or tomorrow.

    Can someone tell me if the return SHOULD be breaking the surface of the water or if it should be aimed down below. I've been told two different things and am, as usual, confused!

    Thanks much.
    18 ft.52" Round Atrium AG -7600 gallons, Sand Filter, Vinyl liner, Royal Entrance Steps, 80 lbs.solarsalt

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    JasonLion's Avatar
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    For a round or oval pool the return would most commonly be aimed to the side and down. If you were trying to lower the alkalinity you might aim the return up towards the surface to aerate for several days. In general, you want to promote as much mixing of the water as possible and cause the water to circulate so that surface debris is pushed into the skimmer. For irregularly shaped pools that can be more complex.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  10. Back To Top    #10

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    okay latest numbers after duming 1/3 of the pool yesterday:

    FC 11
    CC .5 but this was very light and probably only needed half a drop so .0025 ?

    CYA 60
    TA 170
    PH 7.6

    I shocked the pool the other night with cal hypo - perhaps a bit too much, I meant to put in 24 oz. but ended up with 32 instead.

    Is 11 too high to swim in today?
    18 ft.52" Round Atrium AG -7600 gallons, Sand Filter, Vinyl liner, Royal Entrance Steps, 80 lbs.solarsalt

  11. Back To Top    #11
    Quote Originally Posted by waterbug
    Is 11 too high to swim in today?
    Wear and old suit, and rinse off upon exiting the pool.

    I think you had mentioned in another post about having skin dryness or irritation, esp under your suit so I would suggest rinsing EVERY time you exit the pool, not just when the FC is higher.

    8000 gallon 20' x 48" round vinyl frame pool, 12" sand filter (don't have the specs on the pump), TF100 test kit
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    "Shock" is a process, not a product!

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    Re: I finally did it!!!

    Quote Originally Posted by duraleigh
    I suggest you give them to a neighbor or someone who's CYA is low. I know noone likes to waste money, but continuation of the tabs is gonna' cost you a lot more, sooner or later.
    When I switched to BBB I just saved the pucks for vacations. It's a lot easier to have a friend drop a puck in the floater than try to "school" them on BBB.

    Unfortunately, I have more pucks then vacation days.

  13. Back To Top    #13

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    Thanks, off to look for that old suit !

    First, actually, off to Home Depot to get a bag of that solar salt - that might help the skin irritants as well.

    Thanks so much everyone!
    18 ft.52" Round Atrium AG -7600 gallons, Sand Filter, Vinyl liner, Royal Entrance Steps, 80 lbs.solarsalt

  14. Back To Top    #14

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    loving the solar salt! Makes the water much silkier feeling and sparkles too! We put two bags in, didn't notice too much of a change with one - but two made a good difference.
    18 ft.52" Round Atrium AG -7600 gallons, Sand Filter, Vinyl liner, Royal Entrance Steps, 80 lbs.solarsalt

  15. Back To Top    #15
    glad you like it!

    8000 gallon 20' x 48" round vinyl frame pool, 12" sand filter (don't have the specs on the pump), TF100 test kit
    Handy Links: PoolMath, TF-100 Test Kit, Pool School, CYA-Chlorine Chart
    "Shock" is a process, not a product!

  16. Back To Top    #16

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    Quote: FROM THE POOL FORUM - CARL D.
    "Thank you so much for explaining this. I have been aerating my pool for days trying to lower my alkalinity (is about 150 ppm) and it did nothing. My PH is at 7.5 and maintainig that. I will lower the PH and try it again.


    Yup. That's why it didn't work. BTW, if you have a vinyl pool and don't have a heater or SWG system there's no reason to lower T/A. With vinyl pools the absolute max for T/A is 200ppm, not the 120-125 normally recommended. I like to think of the max as 180ppm, because it gives room if pH goes up or down.

    So if your pool is vinyl, don't bother lower T/A. If you have a heater (gas or heat pump) and/or an SWG, or if you have concrete/plaster then you do need to lower T/A."
    __________________

    The discussion centered on aerating to lower alk. and I believe they are saying that you lower PH first, because the aeration then makes PH rise, which in turn lowers the ALK. So I am aerating, but I didn't lower my PH which is 7.6......do I need to lower PH and then aerate or just stay with 7.6 and 170 alkalinity?

    thanks, waterbug
    18 ft.52" Round Atrium AG -7600 gallons, Sand Filter, Vinyl liner, Royal Entrance Steps, 80 lbs.solarsalt

  17. Back To Top    #17
    I would add "unless your elevated TA causes PH increases as chlorine is less effective at higher PH levels as well as potential water clarity issues from higher PH."

  18. Back To Top    #18
    If you want to lower your TA (and I cannot say whether you need to or not... beyond my realm of knowledge) you will have to get your pH down to about 7.2. As the pH rises, knock it down again. When your TA is where you want it, let your pH come up a tad, and stop aerating.

    8000 gallon 20' x 48" round vinyl frame pool, 12" sand filter (don't have the specs on the pump), TF100 test kit
    Handy Links: PoolMath, TF-100 Test Kit, Pool School, CYA-Chlorine Chart
    "Shock" is a process, not a product!

  19. Back To Top    #19
    Mod Squad JohnT's Avatar
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    Quote Originally Posted by waterbug

    Can someone tell me if the return SHOULD be breaking the surface of the water or if it should be aimed down below. I've been told two different things and am, as usual, confused!

    Thanks much.
    Making the return stream break the surface will enhance the motion of surface debris toward the skimmer.
    TFP Moderator
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  20. Back To Top    #20

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    Yes, that makes sense to me now, didn't understand what the connection was and therefore did not lower my ph. I will now if need be.
    Is 170 too high on TA - especially given that we are due for a couple of storms this week - do I mess with it now, or wait till after the storms have finished and retest everything then?
    18 ft.52" Round Atrium AG -7600 gallons, Sand Filter, Vinyl liner, Royal Entrance Steps, 80 lbs.solarsalt

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