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Thread: New guy- Pool eating up bleach

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    Question New guy- Pool eating up bleach

    Hi, new member here. So wife and I picked up a bestway pool for our daughter. Its 12' circle and 30" deep, says about 1400 gallons @ 80% capacity. It came with a filter kit. It's been setup for about a month now. I found this site and started following a bleach & borax method. The water is clear but it is eating up bleach. I have been using cheap test strips but I ordered a tf-100 kit yesterday and hopefully have it tues or Wed. I have been using a ph test kit from my fishtanks test kit and the ph is about 7.8. I can pour in 20oz of bleach and within a few hours or overnight it's all gone. Any idea's? Obviously i'll know more when the test kit arrives.

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    ckk81's Avatar
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    Re: New guy- Pool eating up bleach

    With overnight loss something organic is consuming it. (it's being used up killing something) During the day loss from the sun and swimming is normal.

    This should be of some help.
    Pool School - Guide for Seasonal/Temporary Pools
    30K? gal (20x40, 3ft shallow to 8-9ft hopper), Vinyl IG, single speed 1HP pump, Hayward Micro Clear DE-3600 filter, Hayward Aqua Rite SWG T15 Cell, Rheem/Raypack M206A heater

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    Re: New guy- Pool eating up bleach

    That is probably what is happening. I will try what that link said and raise the fc level to 12ppm. Hopefully the test kit comes tomorrow.

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    Mod Squad JohnT's Avatar
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    Re: New guy- Pool eating up bleach

    Welcome to TFP!

    Does your pool have CYA in it?
    TFP Moderator
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    Hayward S244T Sand Filter with 1HP Whisperflo Pump. Liquidator C-201 and Solar Heat

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    Re: New guy- Pool eating up bleach

    Not sure, the test strips didn't have that test on it. If it does, how can it be fixed?

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    Re: New guy- Pool eating up bleach

    You need CYA. It's mentioned in the seasonal guide. Unless you addressee some you have none.

    30K? gal (20x40, 3ft shallow to 8-9ft hopper), Vinyl IG, single speed 1HP pump, Hayward Micro Clear DE-3600 filter, Hayward Aqua Rite SWG T15 Cell, Rheem/Raypack M206A heater

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    Re: New guy- Pool eating up bleach

    I will measure all that stuff wednesday when the tf-100 arrives.

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    Re: New guy- Pool eating up bleach

    Ok the test kit came and I started playing around with it. So the test confirms that the pool is eating up the bleach due to no cya in it. I have some on order should be here tomorrow. I'm gonna bump the ph up with some borax. I order clorox cyanuric acid. Is it little granuals or large tablets? Pool math says to add 6.4oz by weight or 6.7oz by volume to get it to 30ppm.

    FC- 0
    PH- appx 6.8 (hard to tell)
    TA- 100
    CYA- 0

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    Mod Squad tim5055's Avatar
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    Re: New guy- Pool eating up bleach

    The Clorox CYA will be granules. Pour the amount you want to use in an old sock (no holes in the toes though) so that you can suspend it in the water to allow the granules to slowly dissolve into the water. Scattering on the floor of the pool can bleach/stain the pool floor.

    Hang it in front of a return using a stick or something to keep it from touching the pool wall, again to avoid bleaching/staining.

    Give it a squeeze every half hour or so and it wil dissolve quickly.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: New guy- Pool eating up bleach

    Cool I will do that tomorrow. Once the cya level is good, how long can I expect the bleach to last? I assume I won't have to add as much everyday.

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    Mod Squad tim5055's Avatar
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    Re: New guy- Pool eating up bleach

    Every pool is a little different. You don't have any details,of,your,pool in your signature but I use about 1/2 bottle of 8.25% bleach each day.

    You do, want to add daily.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Mod Squad zea3's Avatar
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    Re: New guy- Pool eating up bleach

    Use PoolMath to figure out what and how much of each chemical your pool needs.
    TFP Moderator
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    Re: New guy- Pool eating up bleach

    Added 6oz of cya using the sock method and squeezing it every so often. Looks like it's gonna dissolve fast. I will test cya later and fc also. I got the PH up to about 7.5 and the fc was 0 as expected. Added some bleach also so ill test everything later on. I am using pool math.

    Its a 12' circle bestway pool, 30" deep. Appx 1500 gallons at 80% capacity according to the paperwork it came with.

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    Re: New guy- Pool eating up bleach

    Don't forget to take the FC test one step further for your CC. Haven't seen those numbers.
    19300 gal, AG vinyl, 1 HP Pentair Dynamo two stage pump, 5 yr old Hayward Vari-Flo sand filter, pool 14 yrs old, well water, testing with Taylor K2006

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    Re: New guy- Pool eating up bleach

    Quote Originally Posted by kschmidt1 View Post
    Don't forget to take the FC test one step further for your CC. Haven't seen those numbers.
    I don't know what that is or means? The pool is still eating up the bleach. I will test it all again tomorrow since I added the cya this afternoon.

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    Re: New guy- Pool eating up bleach

    Ok got the cya up to about 30. Testing today was: Fc-0, TA- 120, PH 7.2.

    Its still not holding any chlorine overnight, what should I do? I am going away for a few days, should I throw a chlorine tablet in a floater while we're gone?

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    Re: New guy- Pool eating up bleach

    I don't know what that is or means?
    The directions for the CC's test are on the laminated card that came with your TF-100.

    read "The ABC's of Pool Water Chemistry" up in Pool School....it describes cc's and why you test for them.

    Reading between the lines, it sounds like you are trying to fix your pool overnight. That won't happen with the methods we teach. You will need to learn what the tests are, how to adjust the parameters and why you adjust the parameters.

    How big is your pool? How long will you be gone?
    Dave S.
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    Re: New guy- Pool eating up bleach

    Its a 12' circle bestway kid pool, 24" deep and appx 1500 gallons. Ill be away 4 days. I been doing all this work and testing I don't want it to be green when we get back home.

    I thought once the cya level gets in the recommended range, the bleach would last longer and not evaporate quick. Its about 30-35ppm now. I added a 1" tab in a floater while we're gone.

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    Re: New guy- Pool eating up bleach

    Check your PM Stang Guy - might be able to assist you
    18550K IG rectangular (15x30) gunite (20-25 years old), Hayward EC65A filter/Hayward SP2602VSP pump, Aquabot classic; K-2006

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    Re: New guy- Pool eating up bleach

    Ok so I did an FC and a CC test. FC 10 and CC 0. When I test the chlorine using the chlorine/ph double vial that came in the kit, it says 0 ppm. I don't understand?

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