Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 11 of 11

Thread: Crystal clear. ..

  1. Back To Top    #1

    In the Industry


    Join Date
    Apr 2012
    Location
    Lynchburg, VA
    Posts
    87

    Crystal clear. ..

    22,000 gallon vinyl pool
    Alk 60
    Ph 7.2
    Cal 250
    Fc .5
    Cc 0
    Cya 35

    What chemical could the pool store have put into the pool that could use up 19.5 ppm of FC in less than 3 hours at night?

    There is not one sign of algae or bacteria in this pool and yet it will not hold FC. The store came by and rail roaded this guy, and then told him he was going to have to shock his pool to 80ppm. Suffice to say he told them to get lost not before they to got $650. He heard about me and asked me to check things out. Bean slamming for about a week now ti get rid of CCs, Ran the overnight test last night and results were less than stellar, as you can read.
    The reason i believe they may have added something they shouldn't was their comment about shocking it and the cya being at 400 or something.
    Anyway, truly the pool looks tremendous but chemically, not so good.

    Thoughts?

    Thanks
    PF

  2. Back To Top    #2
    Divin Dave's Avatar
    Join Date
    Oct 2013
    Location
    Longview, Texas
    Posts
    4,926

    Re: Crystal clear. ..

    Maybe ammonia? That can occur from a wierd breakdown of CYA over the winter. We see quite a bit of that here this spring.
    Pet store, aquarium section.. might be worth a shot.
    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.
    www.tftestkits.net Experience- it's what's learned just after you needed it most !!

  3. Back To Top    #3

    Join Date
    Mar 2015
    Location
    Georgia
    Posts
    157

    Re: Crystal clear. ..

    Maybe Alkyl Dimethyl Benzyl Ammonium Chloride which is a quatanery algaecide. The more that gets poured in the faster the chlorine will drop. Chlorine will eventially break it down.
    Does the water foam?
    Look in the skimmer and see if there is a black grease type substance at the waterline in the skimmer.
    These are signs of ADBAC usage.

    If he just opened the pool then it's probably ammonia from CYA breaking down like Dave said. Here is a thread Chem Geek started and worth reading.
    http://www.troublefreepool.com/threa...Demand-Ammonia
    16k AG Vinyl Sand Filter

  4. Back To Top    #4
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: Crystal clear. ..

    What about antifreeze? Do you use it when closing?
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  5. Back To Top    #5
    Isaac-1's Avatar
    Join Date
    May 2010
    Location
    SW Louisiana
    Posts
    6,711

    Re: Crystal clear. ..

    Remember MPS chlorine free shock shows up as CC on the FAS-DPD chlorine test, there is a special test for MPS that lets you account for it. As to the chlorine consumption, who knows, maybe they spiked it then added lots of chlorine reducer like Sodium Thiosulfate.
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
    I use and endorse TFtestKits TF-100 from http://tftestkits.net
    ~Remember TFP counts on your donations to keep this site ad free~

  6. Back To Top    #6

    In the Industry


    Join Date
    Apr 2012
    Location
    Lynchburg, VA
    Posts
    87

    Re: Crystal clear. ..

    Thank you all for the tips.

    Still no CCs and no FCs
    I will assume to keep slamming, but in the meantime, when i go to the pet store, what am I looking for an ammonia test or remover?
    Thanks all.

  7. Back To Top    #7

    TFP Guide

    Azgirl71's Avatar
    Join Date
    Apr 2015
    Location
    Sierra Vista, Az
    Posts
    2,586

    Re: Crystal clear. ..

    You are looking for the ammonia test.
    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

  8. Back To Top    #8
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: Crystal clear. ..

    Look for an Ammonia test kit at a pet store or aquarium place. Rumor has it Walmart sells one cheap. If the pool store sells one, it will no doubt be 3X as expensive.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

  9. Back To Top    #9
    YoRgH's Avatar
    Join Date
    Jun 2014
    Location
    Roberval, Québec
    Posts
    40

    Re: Crystal clear. ..

    Quote Originally Posted by pooldv View Post
    What about antifreeze? Do you use it when closing?
    Antifreeze have amonia?
    Sorry for my english, je suis francophone
    I live in north, no ice in my pool since may 1 !
    Stylus aboveground swimming pool 45 000 liters
    18' round and 52" high with sand filter

  10. Back To Top    #10
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: Crystal clear. ..

    No, but it appears to consume chlorine trying to oxidize it. Here is a thread about it. http://www.troublefreepool.com/threa...e-and-Chlorine
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  11. Back To Top    #11

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
    Posts
    12,082

    Re: Crystal clear. ..

    The difference is that the rate of chlorine loss, if from anti-freeze, is MUCH slower than what one would see with ammonia. With ammonia, the chlorine is consumed almost immediately (in minutes, depending on circulation) and turns into CC (monochloramine). Given how fast the chlorine was lost in the situation described in this thread, that sounds much more like ammonia than anything else.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •