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Thread: Chlorine

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    Chlorine

    I have noticed in the last couple of weeks that I am having to add much more acid and bleach than usual. I'm adding acid about every other day and my chlorine levels are dropping to 3-4 in just a day or so. I realize that with the temperatures rising chemicals will burn away faster, but it seems extreme. Suggestions?
    Also, the pressure is running very low to where my vacuum barely moves. What would be causing that? Thanks!
    14,000 gallon in ground pebbletech pool
    Purex Clean & Clear Plus 2hp pump - Hayward Navigator

    Test Kit TF-100
    Cave Creek, Arizona

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    frustratedpoolmom's Avatar
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    Re: Chlorine

    Can you post a full set of test results? That would help us advise better.
    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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    JasonLion's Avatar
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    Re: Chlorine

    Also, have you backwashed/cleaned the filter recently?
    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

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    Re: Chlorine

    Here are the requested levels: FC=2 CC=.5 TC=2.5 pH=8 TA=90 CYA=???? The water filled the tube to the top and I could still faintly see the black dot. I did the test twice because I thought I goofed it up the first time, but both times were the same. In the past my CYA has always run high. As far as the pressure, I put in brand new filters in January. I thought that they were to be cleaned twice a year. I also thought that if the filters were dirty that the pressure ran high? I also saw the info regarding the ammonia levels in the water. I thought I would wait to buy the test kit for that until I got a little bit more information. Thanks so much for the help!
    14,000 gallon in ground pebbletech pool
    Purex Clean & Clear Plus 2hp pump - Hayward Navigator

    Test Kit TF-100
    Cave Creek, Arizona

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    Mod Squad JohnT's Avatar
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    Re: Chlorine

    Lack of CYA is probably the reason for the chlorine use.

    Low pressure comes from restrictions or leaks on the inlet side of the pump. Any bubbles in the pump strainer basket or coming from the returns? Dirty skimmer baskets or pump strainer basket? Your Navigator could also be the cause of the low pressure. Is the pressure normal when the Navigator isn't hooked up? Check the hose and the unit for obstructions if it appears the Navigator is the cause.
    TFP Moderator
    20K Gallon 20X36 Vinyl Inground
    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    frustratedpoolmom's Avatar
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    Re: Chlorine

    Quote Originally Posted by JohnT
    Lack of CYA is probably the reason for the chlorine use.
    Ditto that. Have you performed an overnight FC test?

    Based on the numerous ammonia cases this year, I would suspect that your CC would be much higher if it were an ammonia situation. Did you winterize your pool, and did you experience a prolonged shocking process upon opening this season?

    I see you added borates to your pool, so I would think your PH would be more stable. Perhaps you could try lowering the TA down to 70 to see if that would help. Do you have a water feature that provides a source of aeration, causing the PH to go up?
    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: Chlorine

    Based on your advice, I added stabilizer to raise my CYA level. I'm sure I didn't add enough yet, but the last thing I want to end up with is too high a level. How long do I have to wait to test the water to see how much more I need to add? Also, when I get the CYA where it should be, in what order should I adjust chlorine, pH and borates? Should I still lower my TA to 70?

    Thank you!
    14,000 gallon in ground pebbletech pool
    Purex Clean & Clear Plus 2hp pump - Hayward Navigator

    Test Kit TF-100
    Cave Creek, Arizona

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    frustratedpoolmom's Avatar
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    Re: Chlorine

    Quote Originally Posted by 65corvette
    Based on your advice, I added stabilizer to raise my CYA level. I'm sure I didn't add enough yet, but the last thing I want to end up with is too high a level. How long do I have to wait to test the water to see how much more I need to add? Also, when I get the CYA where it should be, in what order should I adjust chlorine, pH and borates? Should I still lower my TA to 70?

    Thank you!
    If the CYA was the granule form, wait a week to retest it. How much did you add/what was your target for dosing? After 24 hours, assume "it's in there" and raise your FC level accordingly (see the chart for reference).

    Today, use MA to lower the PH to 7.4 and the TA will come back down a bit.

    As far as bringing the TA lower, do you have a water feature that causes aeration? Waterfall/attached spa, foutain? If so, then yes, target the TA to 70. IF not, once you readjust borates (which should be done last) that should help with stabilizing the PH.

    Finally, be sure to keep an eye on the FC while you are working on things so you don't get an algae bloom. In a couple of days do an "overnight FC test" to make sure your FC is holding.

    Hope this helps
    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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