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Thread: middle of shock out of FAS-DPD reagent

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    middle of shock out of FAS-DPD reagent

    I won't have enough FAS DPD reagent (K-2006) to finish my shock. I've been testing 2-3 times per day and it went quick. I can't find any locally so i'll have to wait a week or so for online order to arrive. I do have access to to DPD reagents (#1 and #2 i believe). Can i use these with my K-2006 kit? I know it's not ideal but at least it's better than nothing.
    20000 gal IG freeform, vinyl, Pentair Sand Dollar filter, Pentair 2 speed pump, Pentair Intellitouch controller, Pentair Heat Pump. Built 2008

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    JasonLion's Avatar
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    Re: middle of shock out of FAS-DPD reagent

    You can't really use the DPD test without a DPD color comparator to compare the color to.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: middle of shock out of FAS-DPD reagent

    ok. I guess i'll have to buy the DPD test kit. How to I go about managing a shock with it? I'm not sure how it works. Can i use it to keep my shock level at 20? I need something to manage the chlorine until the replacement reagent shows up. Sorry for the questions. I'm sure it's on the board somewhere, but i don't have time to search due to work and if i am going to pick something up, it'll have to be right after work.
    20000 gal IG freeform, vinyl, Pentair Sand Dollar filter, Pentair 2 speed pump, Pentair Intellitouch controller, Pentair Heat Pump. Built 2008

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    Re: middle of shock out of FAS-DPD reagent

    Is your pool plaster or vinyl liner?

    What is your CYA?
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Mod Squad Bama Rambler's Avatar
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    Re: middle of shock out of FAS-DPD reagent

    I wouldn't buy the DPD kit. It really won't help with a shock level that high. I'd recommend checking with tftestkits and see if they can ship the FAS-DPD refills to you overnight. I know it'll cost more but you'll have something you can actually use.

    In a bind you could buy a cheap OTO kit and dilute the pool water. 1 part pool water to 3 parts chlorine free water and multiply the results by 4. It's not accurate at all but it's slightly better than nothing.
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    Re: middle of shock out of FAS-DPD reagent

    as of noon. it dropped 3.5ppm for overnight test.
    raised FC to 20 this morning and at noon
    CC .05
    ph 7.3- tested before shocking
    TA 90
    CH 110
    CYA approx 55-60
    20000 gal inground vinyl
    20000 gal IG freeform, vinyl, Pentair Sand Dollar filter, Pentair 2 speed pump, Pentair Intellitouch controller, Pentair Heat Pump. Built 2008

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    Re: middle of shock out of FAS-DPD reagent

    I will suggest something similar to bama rambler.

    Dilute your pool water by half and test using the OTO kit. When your water appears to test 5ppm in the OTO test block, it will actually be 10ppm.

    Next Calculate enough FC to get you to 25ppm and put that amount to the pool.

    Repeat as needed.

    Diluting more than 50% in my experience, is wildly innaccurate, but a 50% dilution is not too bad. The 25ppm target is a little over your ppm but with a CYA of 55-60, you will be fine.

    So, you will be fluctuating between roughly 10ppm and roughly 25ppm......not exactly ideal but it will be close enough until you can get the 870 powder and/or the 871 reagent to resume your FAS/DPD testing (1-3 days, if you order today, depending on where you live)
    Dave S. - Forum owner
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    tree debris and a constant state of shock

    This has been an extremely dry and hot past couple of weeks in western NY. Our pool is surrounded by trees. I'm currently shocking the pool due to a cloudiness issue. It is clearing up but the overnight FC test is still dropping. This may or may not have anything to due with the constant tree pollen/organic debris that is falling in the pool. Will i ever get ahead of it? Or will it constantly keep eating FC and make my overnight test fail which in turn will make me continue to shock until pollen/debris season is over? This is my first season of BBB.
    20000 vinyl IG
    FC 20 continue to shock 3x per day until pass Overnight test
    CC remains at .5
    PH has been steady at 7.3
    TA 90
    CH 110
    CYA approx 55-60
    The ironic part is that I discuss pools with 2 people regularly. 1 of them doesn't test very often and just adds a jug of bleach 2 or 3 times a week. Another does test at a pool store every 2 weeks or so and also dumps bleach in a few times a week. Neither has had an alge problem and their eyes glaze over when i start talking pool chemistry. Here i am, telling them they should test for such and such and i wind up with a cloudy pool. Go figure.
    20000 gal IG freeform, vinyl, Pentair Sand Dollar filter, Pentair 2 speed pump, Pentair Intellitouch controller, Pentair Heat Pump. Built 2008

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    frustratedpoolmom's Avatar
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    Re: tree debris and a constant state of shock

    I don't think it's pollen - we've had alot of it here to and I'm not experiencing cloudy water or overnight losses...
    How long have you been at the shock process?
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
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    Re: tree debris and a constant state of shock

    jt,

    Please keep your related posts all in one thread. Responders here are looking for a complete "story". keeping your posts together gives a better picture and saves redundant Q&A's.
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    frustratedpoolmom's Avatar
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    Re: tree debris and a constant state of shock

    I see... I've read your other threads - have some POP JT keep up the shock progress - you'll get there
    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: middle of shock out of FAS-DPD reagent

    Topics Merged for Consistency
    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: middle of shock out of FAS-DPD reagent

    Makes sense. Sorry for the etiquette faux pas. My FC drop last night was only 1.5. So i think i may be almost there. I was able to track down 16 oz of the FAS-DPD reagent locally for $30. I realize it has a year or so shelf life, but considering that the 2oz. size would have cost me almost $20 with shipping, I just went ahead and got it. Now I can test my chlorine levels to my hearts content this season. Thanks for everyone's encouragement and help.
    20000 gal IG freeform, vinyl, Pentair Sand Dollar filter, Pentair 2 speed pump, Pentair Intellitouch controller, Pentair Heat Pump. Built 2008

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    frustratedpoolmom's Avatar
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    Re: middle of shock out of FAS-DPD reagent

    If you store the drops in a temp controlled dark place they should last you several seasons...
    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: middle of shock out of FAS-DPD reagent

    Yep i have it in my basement now. In a dark room that is a pretty consistent 68-72 degrees year round.
    20000 gal IG freeform, vinyl, Pentair Sand Dollar filter, Pentair 2 speed pump, Pentair Intellitouch controller, Pentair Heat Pump. Built 2008

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