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Thread: TF100 Test Results - Am I Near a CYA Record?

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    TF100 Test Results - Am I Near a CYA Record?

    Received my TF100 Kit and ran a complete set of tests.

    Time taken 1:30
    Pool Temp 72 deg
    FC: 20
    CC: 0.5
    PH: 7.2
    CH: 400
    TA: 130
    CYA: 280

    Pool was drained and refilled in early 2013. Have been using primarily 3" tablets and Powdered Shock since then.

    Will drain some of the pool water and replace, not sure I want to drain 86% like Pool Math suggests, but maybe 40-50% now and some more later. Will put the Multiport Valve on waste and let the pump drain the pool.

    Any other recommendations?


    Thanks,

    Gary
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    That is some serious CYA!
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

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    Re: TF100 Test Results - Am I Near a CYA Record?

    We'd recommended you drain it in 1/3 volumes.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
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    Re: TF100 Test Results - Am I Near a CYA Record?

    Thanks - planning to start now, will shoot for approximately 20" which I believe will be about 6400 gallons. At our water and sewer rates, I estimate draining 6400 gallons will cost about $53 in water charges.

    - - - Updated - - -

    Quote Originally Posted by Azgirl71 View Post
    That is some serious CYA!
    I can't claim all the credit. The company who drained the pool added the initial stabilizer. Guess I was over shocking in the winter.
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    That CYA isnt even close to the record !! but its prolly in the top 10!
    Sounds like you have a good plan started.
    Divin Dave,
    IG Vinyl, 15' x 30', 3 1/2' - 6' deep, Oval, ~15K gal, Intelliclor IC40, Intelliflo VS pump, Clean and Clear 420 Filter, auto-fill-disabled, Retrofit LED Color Light, Dolphin Nautilus Robot, TF100 Test Kit, Taylor K1766 Salt Test Kit, Tftestkit Pressure Gauge.
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    Re: TF100 Test Results - Am I Near a CYA Record?

    Mine was 300+ when I moved into my house last september.

    the recent paper work (july 2014) from the pool store said 50 lol.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
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    Re: TF100 Test Results - Am I Near a CYA Record?

    After a couple of trips to the store, finally got the draining underway at 4:10. Its now 4:40 and the pool is down about 6". Found out the skimmer auto seal (or what ever it's called) doesn't seal 100%. As a result the pool was starting to suck air. I place a hose in the skimmer with a very small stream of water and that solved the problem. Also had an issue with the drain hose. We just had out front yard landscaped. The hose didn't quite reach the street. I put it in the river rocks but when I hit full speed on the pump, it started thrashing around and messed up some of the gravel and dirt. Hopefully I get done and repair it before the wife gets home!!

    Tested our tap water for CH and it is 100.


    Gary
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    Hit 20" down at 5:30 (1 hour and 20 minutes to pump out approx 6400 gallons). Stopped the pump, set the multiport valve to closed (hoping to maintain pump prime). Removed power from the pump. Began refilling the pool. Repaired the front yard. Not sure how long it will take to refill but likely 4-5 times as long as it took to remove 20" of water (filling through the fill line - 1/2" pvc and another outlet on the other side of the house through a 3/4" hose feed by a 1/2" copper line.
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    That CH seems quite low for your region. Do you have a water softener? Could you have tested your water after it ran through it?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: TF100 Test Results - Am I Near a CYA Record?

    Quote Originally Posted by duraleigh View Post
    That CH seems quite low for your region. Do you have a water softener? Could you have tested your water after it ran through it?
    No water softener. We are outside of Tucson city limits and the subdivision had there own well (Hub Water) at one time. Metro water bought hub and then we started getting blended water.

    Completed the fill last night but overfilled by a couple of inches. I checked the water just now and had these readings:

    Temp 75 degrees
    Time 12:10
    FC: 10 ppm
    CC: 0.5 ppm
    PH: 7.2
    CH: 275 ppm
    TA: 140 ppm
    CYA: 160 ppm

    Also while the water level was low, noted a small amount of green algae on the underside of the vacuum fitting.

    Assume I should drain another 1/3 (with the overfill I likely exceed the 1/3 by a little) and add about 100 oz of chlorine to raise the FC. Will do the drain in the evening to not subject the plaster to high temps since is will likely be close to 100 degrees today.

    Any other suggestions.
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    Added 128 oz of 10% chlorine at 12:45. After 45 minutes (pump on high speed) rechecked FC - now 15 which is what pool math predicted for my estimate pool size and conditions.
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    Quote Originally Posted by garyengr View Post
    I can't claim all the credit. The company who drained the pool added the initial stabilizer. Guess I was over shocking in the winter.
    Just want to make sure you understand it's the 3" tablets that are the problem and not over shocking. If you are using the TFP method of pool care with liquid bleach and common chemicals instead of the tablets and pool store chemicals you should have clean sanitary water that's less trouble and cost to maintain. You also do not need to routinely shock the pool. Instead you maintain a proper level of FC and you don't have problems.

    Those tablets contain CYA and if you're using them to keep the FC up then you are constantly raising your CYA level. It's a never ending cycle who's only cure is to quit using tablets for maintenance. Please read this if you haven't already. It explains the method we use with great results for pool care. http://www.troublefreepool.com/conte...at-is-tfpc-bbb
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
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    Re: TF100 Test Results - Am I Near a CYA Record?

    Quote Originally Posted by Kiss4aFrog View Post
    Just want to make sure you understand it's the 3" tablets that are the problem and not over shocking. If you are using the TFP method of pool care with liquid bleach and common chemicals instead of the tablets and pool store chemicals you should have clean sanitary water that's less trouble and cost to maintain. You also do not need to routinely shock the pool. Instead you maintain a proper level of FC and you don't have problems.

    Those tablets contain CYA and if you're using them to keep the FC up then you are constantly raising your CYA level. It's a never ending cycle who's only cure is to quit using tablets for maintenance. Please read this if you haven't already. It explains the method we use with great results for pool care. http://www.troublefreepool.com/conte...at-is-tfpc-bbb
    Thank you and do understand that. Shock also contributed to the CYA increase as I was using powdered shock which also contains CYA. (4. Dichlor - A stabilized, granular, fast-dissolving form of chlorine. Because it dissolves so easily, it is often sold as "shock". Like trichlor, dichlor adds chlorine and CYA to your water and lowers the pH. Use of dichlor can raise your CYA level very quickly.) I was using between 3 and 5 3" tablets in a floater about every two weeks and then every week or two would throw in two bags of powdered shock. In the past, I used liquid chlorine to shock but somewhere about 4 years ago I changed to powdered shock and do not remember why.
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    While I targeted removing 33% of the water, I'm was curious about what I actually removed. Using the CH and CYA measurements before removing water and after removing and adding tap water back and the measurements of CH of our tap water allows for an estimate of the percent water removed. Using the CH measurements I estimated 39.4% of the water was removed and using the CYA measurements I estimated 40.7% was removed. Since these are close, it would be reasonable to assume 40% of the water was removed.
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    Removed 25" of water and replaced tap water. Tested with the following result:

    Water Temp - 74 degs
    FC: 12 ppm
    CC: 0.5 ppm
    PH: ~7.3
    CH: 200 ppm
    TA: 130 ppm
    CYA: 92 ppm

    Reread some of the Pool School Chemistry and noted the following comment on CYA: "If you have a SWG or very high levels of direct sunlight, CYA is typically kept between 70 and 80." Our pool gets direct sunlight whenever the sun is up. Does this mean I should be shooting for 70 to 80 rather than 30 to 50 (can't get much more direct sunlight than here in the desert)?
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    If you have a SWG, its advisable to take the Cya higher to prevent you over working it.
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    Re: TF100 Test Results - Am I Near a CYA Record?

    Quote Originally Posted by Patrick_B View Post
    If you have a SWG, its advisable to take the Cya higher to prevent you over working it.
    Patrick - understand but it says "OR a very high level of direct sunlight". That and I'm getting tired of draining and refilling!!
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    I like to keep my CYA 70-80 in the AZ sun. Pool gets lots of direct sunlight.
    Lisa
    Intex AG vinyl 15' x 48" 4,300 gallons due to skimmer install, Krystal Clear SF pump combo 2800 GPH, Krystal Clear SWG, Pool Blaster Max vacuum, Hayward thru the wall skimmer, TF 100 test kit with speed stir, K 1766 Taylor salt test, My SLAM Process

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    Re: TF100 Test Results - Am I Near a CYA Record?

    Quote Originally Posted by Azgirl71 View Post
    I like to keep my CYA 70-80 in the AZ sun. Pool gets lots of direct sunlight.
    Thanks, I will then drain and replace >5000 gallons in the next couple of days which should get my CYA to < 70. After that will address the low PH, high TA and low CH.
    20,000 gal IG Plaster Irregular Shaped Pool (1987), Hayward SP3400VSP Ecostar Pump, Hayward Pro-Grid 60 SqFt DE Filter, Hayward Pool-Vac Ultra, TF100, Speed Stir, Stenner Pump & 15 Gallon Tank, Oasis Z5, and LA Spas H.E.E.T Model

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    Re: TF100 Test Results - Am I Near a CYA Record?

    Quote Originally Posted by garyengr View Post
    Patrick - understand but it says "OR a very high level of direct sunlight". That and I'm getting tired of draining and refilling!!
    Sure, but if it were me, I would work up to a higher level to see how I did.
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