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Thread: Chlorine is ok, other stuff out of whack

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    Chlorine is ok, other stuff out of whack

    What do I do when my water hardness is perfect and my chlorine level is a little high, according to the chemical indicator strips, but my CYA, PH and Alkalinity are all so low they don't even register. Where do I start?

    Unfortunately, we live 45 minutes away from any official pool store water testing. I have used the kits and they have turned out to be very accurate when I have compared it to the pool store readings. But right now all I have are the strips.

    Not sure how to add a signature, but I have a 20 x 40 in-ground (approx. 36,000 gallons), vinyl liner, in Iowa (only open six months out of year).
    --Sheila

    Hayward TriStar Pool Pump 1.5 HP (replaced original pump in 2008), 300 pound Sand filter, 20' x 40' vinyl, in-ground pool constructed in 2005, approximately 36,000 gallons, filter and pump running 24/7 mid-April through mid-October. Pool in the sun from about 10am until sunset. Nearest trees are about 80 feet away, and that is also where the pool pump house is located. We do not use a heater or a cover of any kind (except in winter, of course). Taylor Complete FAS-DPD K-2006 Test Kit.

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    Mod Squad Bama Rambler's Avatar
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    Re: Chlorine is ok, other stuff out of whack

    The best place to start is ordering a good test kit and tossing those strips. Strips are not to be trusted.

    With a good test kit (see my sig) you can be sure of your numbers and not be guessing at what they may be.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Mod Squad woodyp's Avatar
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    Re: Chlorine is ok, other stuff out of whack

    Get some pool store numbers and post them up for us. Edit your profile with a sig line and give us your pool specs so folks here can help. We will.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
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    frustratedpoolmom's Avatar
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    Re: Chlorine is ok, other stuff out of whack

    Quote Originally Posted by Bama Rambler
    The best place to start is ordering a good test kit and tossing those strips. Strips are not to be trusted.

    With a good test kit (see my sig) you can be sure of your numbers and not be guessing at what they may be.
    What he said...
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    Re: Shock Level For CC Buildup

    My total chlorine is 1.2 and FC is 0. My CYA is 103 and pH is 7.6. Total alkalinity is 165 with adjusted alkalinity at 134 (whatever that means...I'm just reprinting what's on my print-out analysis). Should I shock or leave it alone? The water is clear. It's an outside, in-ground pool about 36,000 gallons.
    --Sheila

    Hayward TriStar Pool Pump 1.5 HP (replaced original pump in 2008), 300 pound Sand filter, 20' x 40' vinyl, in-ground pool constructed in 2005, approximately 36,000 gallons, filter and pump running 24/7 mid-April through mid-October. Pool in the sun from about 10am until sunset. Nearest trees are about 80 feet away, and that is also where the pool pump house is located. We do not use a heater or a cover of any kind (except in winter, of course). Taylor Complete FAS-DPD K-2006 Test Kit.

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    Mod Squad Bama Rambler's Avatar
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    Re: Chlorine is ok, other stuff out of whack

    Still haven't ordered that test kit huh?? Just kidding you.

    If you don't have and swcg you need to drain about half of your water to get the CYA down to about 50ish. Once you've done that you need to begin the shock process.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

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    Re: Chlorine is ok, other stuff out of whack

    I actually did order a test kit, but the results I gave you aren't from the kit. They are from the analysis that I received from the pool people. They said the chlorine is too high but the free chlorine is 0. They said to leave everything alone, but I wanted to see what you thought. Thank you.
    --Sheila

    Hayward TriStar Pool Pump 1.5 HP (replaced original pump in 2008), 300 pound Sand filter, 20' x 40' vinyl, in-ground pool constructed in 2005, approximately 36,000 gallons, filter and pump running 24/7 mid-April through mid-October. Pool in the sun from about 10am until sunset. Nearest trees are about 80 feet away, and that is also where the pool pump house is located. We do not use a heater or a cover of any kind (except in winter, of course). Taylor Complete FAS-DPD K-2006 Test Kit.

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    Re: Chlorine is ok, other stuff out of whack

    I would ignore their results and do your own testing. I simply have become completely jaded with pool store test results. Especially this year, they just seem to be completely unreliable.

    However, assuming they are valid (which I would never assume), your CYA is too high to successfully manage your pool. Additionally your chlorine is w-a-a-y too low at any cYA level let alone a level that is excessive.

    I would put their advice right about on par with what we've seen this year as pool store test results.....just about worthless.....sorry to be so negative but keep reading on this forum and draw your own conclusions.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Butterfly's Avatar
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    Re: Chlorine is ok, other stuff out of whack

    Most CYA tests can only test up to 100 and things get really subjective near/at that point. You can do the 50/50 dilution method (one part pool water and one part tap water and multiply the result by 2) to test your CYA to determine how close to 100 it is.

    I hope you will post test numbers from your kit. There are Extended Test Kit Directions here: extended-test-kit-directions-t25081.html
    Let us know if you need any help.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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    Re: Chlorine is ok, other stuff out of whack

    Can my pool be crystal clear and feel and smell ok but still have problems? Even though the numbers seem wacky, the pool feels and looks great. I am so grateful that you all are here for me!!
    --Sheila

    Hayward TriStar Pool Pump 1.5 HP (replaced original pump in 2008), 300 pound Sand filter, 20' x 40' vinyl, in-ground pool constructed in 2005, approximately 36,000 gallons, filter and pump running 24/7 mid-April through mid-October. Pool in the sun from about 10am until sunset. Nearest trees are about 80 feet away, and that is also where the pool pump house is located. We do not use a heater or a cover of any kind (except in winter, of course). Taylor Complete FAS-DPD K-2006 Test Kit.

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    Butterfly's Avatar
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    Re: Chlorine is ok, other stuff out of whack

    Quote Originally Posted by Samiam
    Can my pool be crystal clear and feel and smell ok but still have problems?
    Yep, it can. That is why you have a test kit, to be in control and know what is going on with the water.
    Even though the numbers seem wacky, the pool feels and looks great. I am so grateful that you all are here for me!!
    We're all glad to be here for you. Now, what are your test results?
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: Chlorine is ok, other stuff out of whack

    I'm at work (shhhh), so I'll post them when I get home. Thank you!
    --Sheila

    Hayward TriStar Pool Pump 1.5 HP (replaced original pump in 2008), 300 pound Sand filter, 20' x 40' vinyl, in-ground pool constructed in 2005, approximately 36,000 gallons, filter and pump running 24/7 mid-April through mid-October. Pool in the sun from about 10am until sunset. Nearest trees are about 80 feet away, and that is also where the pool pump house is located. We do not use a heater or a cover of any kind (except in winter, of course). Taylor Complete FAS-DPD K-2006 Test Kit.

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    Re: Chlorine is ok, other stuff out of whack

    The results of the test kit are:
    chlorine: 0
    pH: 6.8
    Total alkalinity: 230
    Total hardness: 410
    Cyanuric acid: 20
    Since I have done nothing because I'm not sure what to do, the water has turned cloudy overnight. The temperature of the water is 86 just because it's been so hot here in Iowa. It looks to me like I definitely need to shock. What are your recommendations? Thank you.
    --Sheila

    Hayward TriStar Pool Pump 1.5 HP (replaced original pump in 2008), 300 pound Sand filter, 20' x 40' vinyl, in-ground pool constructed in 2005, approximately 36,000 gallons, filter and pump running 24/7 mid-April through mid-October. Pool in the sun from about 10am until sunset. Nearest trees are about 80 feet away, and that is also where the pool pump house is located. We do not use a heater or a cover of any kind (except in winter, of course). Taylor Complete FAS-DPD K-2006 Test Kit.

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    Butterfly's Avatar
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    Re: Chlorine is ok, other stuff out of whack

    First, use borax and raise the pH to 7.4 ish.

    Then shock the pool using Pool School directions.

    Post back if you have any questions.
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

    ~ One should not use a sledge hammer to swat a mosquito. ~

    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

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    Re: Chlorine is ok, other stuff out of whack

    Should I add algaecide? Is it ok to aerate the pool to increase the pH and lower the alkalinity in addition to the borax?
    --Sheila

    Hayward TriStar Pool Pump 1.5 HP (replaced original pump in 2008), 300 pound Sand filter, 20' x 40' vinyl, in-ground pool constructed in 2005, approximately 36,000 gallons, filter and pump running 24/7 mid-April through mid-October. Pool in the sun from about 10am until sunset. Nearest trees are about 80 feet away, and that is also where the pool pump house is located. We do not use a heater or a cover of any kind (except in winter, of course). Taylor Complete FAS-DPD K-2006 Test Kit.

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    Smykowski's Avatar
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    Re: Chlorine is ok, other stuff out of whack

    Quote Originally Posted by Samiam
    Should I add algaecide? Is it ok to aerate the pool to increase the pH and lower the alkalinity in addition to the borax?
    I would do what Butterfly said first.
    Quote Originally Posted by Butterfly
    First, use borax and raise the pH to 7.4 ish.
    Then shock the pool using Pool School directions.
    Post back if you have any questions.
    Worry about alkalinity later.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Re: Chlorine is ok, other stuff out of whack

    Do not use algaecide. Bleach is what you need, after you get the pH adjusted. Re-read pool school, and particularly the article on shocking. It may take a bit to get the pool in shape, but now that you have your test kit and this forum, you'll get there and never look back! Gone are the days of needing to rely on someone else to tell you the status of your water or what/why you need to make corrections to the chemicals.

    On another note, how in the world do you swim in Iowa 6 months a year with no heater!?!?
    POOL: Intex ultra new in 2014 (32 x 16 x 52) (seasonal; on concrete pad covered with 1.5" extruded or whatever foam insulation sheets - ugly, but comfy); added a through-wall skimmer; I add salt for feel. EQUIPMENT: Pentair SuperFlo pump (1HP, 2SPD); Pentair cartridge filter (200 sq. ft); Pentair MasterTemp natural gas heater (400,000 btu) Climate/Location: Eastern Nebraska

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    Re: Chlorine is ok, other stuff out of whack

    Crek31, We have had the pool since 2005 but only used the heater for a few days the first fall...then propane prices soared, and we learned to enjoy the invigorating cool waters in April and October! I've read that cold water therapy is good for you! Actually the pool is in the sun most of the day, so it gets a lot of natural heat, but we don't cover it, so it loses heat at night, but we just "swim and bare it!" LOL.
    --Sheila

    Hayward TriStar Pool Pump 1.5 HP (replaced original pump in 2008), 300 pound Sand filter, 20' x 40' vinyl, in-ground pool constructed in 2005, approximately 36,000 gallons, filter and pump running 24/7 mid-April through mid-October. Pool in the sun from about 10am until sunset. Nearest trees are about 80 feet away, and that is also where the pool pump house is located. We do not use a heater or a cover of any kind (except in winter, of course). Taylor Complete FAS-DPD K-2006 Test Kit.

  19. Back To Top    #19

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    Need help determining course of action with combined chlorin

    Without any prefacing comments, I will just give you my numbers, and you can let me know what I should do because what I have been doing isn't working. pH = 7.0; Base demand is 15 drops to get to 7.4;
    Free Chlorine = .5; Combined Chlorine = 1.5;
    Alkalinity = 120; Calcium Hardness = 300; Saturation index = -0.3
    --Sheila

    Hayward TriStar Pool Pump 1.5 HP (replaced original pump in 2008), 300 pound Sand filter, 20' x 40' vinyl, in-ground pool constructed in 2005, approximately 36,000 gallons, filter and pump running 24/7 mid-April through mid-October. Pool in the sun from about 10am until sunset. Nearest trees are about 80 feet away, and that is also where the pool pump house is located. We do not use a heater or a cover of any kind (except in winter, of course). Taylor Complete FAS-DPD K-2006 Test Kit.

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    linen's Avatar
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    Re: Chlorine is ok, other stuff out of whack

    As previously stated, you need to do the shocking process.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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