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Thread: Help please! Chlorine is gone!

  1. Back To Top    #1

    Join Date
    May 2010
    Location
    Missouri City, TX
    Posts
    9

    Help please! Chlorine is gone!

    I thought I could do this, but this morning I had 0 chlorine-nada, zip, none! Pool is 2 months old-I just took over from the pool guy to try the BBB method. I did the overnight chlorine loss 2 nights ago and only lost 0.5. Here are my numbers from yesterday morning (6/1):
    FC: 2.5
    CC: 0
    TC: 2.5
    pH: 7.8
    T/A: 140
    CH: 160
    CYA: 60

    So, I added 1 gallon of Clorox bleach (6%) directly to the pool water. I turned the auto chlorinator to 0 (there were 3 small pucks left in there). A couple hours later I added 15 lb. of Hardness Plus to increase the CH. I retested the chlorine in the afternoon and it was at 6. I thought things were looking ok till this morning.

    My numbers today: only change was 0 chlorine and CH was 200. I retested the CYA and I think it's 60, although at 70 I could just barely see the black dot so maybe it's higher.

    Could the Hardness Plus have wiped out my chlorine? This happened a few weeks ago after heavy rain (wiped out chlorine levels) but no rain last night-just the boys playing in the spa and swimming.

    I added about 2.5 gallons of bleach this morning. What else should I do?
    24,000 gunite freeform w/ pebble plaster, weeping wall, spa; Pentair Cartridge Filter; 2HP Whisperflow pumps; inline chlorinator

  2. Back To Top    #2
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,963

    Re: Help please! Chlorine is gone!

    Do an overnight test tonight.

    6% clorox comes in 96 oz and 182 oz. Did you add one small jug or one large?

    You want to use a target of 8 for now, and try to keep your FC above 5 at all times. This means testing in the evening and adding bleach to reach your target. Targeting 8 or 9 in the evening should keep you above 5 by the next evening.

    Do an overnight test tonight, post back if you lose more than 1ppm.
    Overnight FC Loss Test
    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

  3. Back To Top    #3

    Join Date
    May 2010
    Location
    Missouri City, TX
    Posts
    9

    Re: Help please! Chlorine is gone!

    Will do. I added about 1 1/2 of the large (182oz.) jugs. My FC is now at 6 (10 am). I'll add some more to bring it up to 8 and get back to you tomorrow. It looks like there might be rain tonight. Will that affect the overnight test?
    24,000 gunite freeform w/ pebble plaster, weeping wall, spa; Pentair Cartridge Filter; 2HP Whisperflow pumps; inline chlorinator

  4. Back To Top    #4

    Join Date
    Jan 2009
    Location
    Cupertino, CA
    Posts
    1,966

    Re: Help please! Chlorine is gone!

    Depends on how much. Normal amounts of rain won't really affect the overnight test. Flooding the place and dumping half a yard of soil in the pool, yeah that might invalidate the results.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  5. Back To Top    #5

    Join Date
    May 2010
    Location
    Missouri City, TX
    Posts
    9

    Re: Help please! Chlorine is gone!

    Did the overnight test-but we did have lots of rain (about 2 in). FC went from 8 to 7 and CC was at 0.5. I think I'll do it again tonight if it doesn't rain, just to be sure. Should I consider shocking with this loss of FC?
    24,000 gunite freeform w/ pebble plaster, weeping wall, spa; Pentair Cartridge Filter; 2HP Whisperflow pumps; inline chlorinator

  6. Back To Top    #6

    Join Date
    Jan 2009
    Location
    Cupertino, CA
    Posts
    1,966

    Re: Help please! Chlorine is gone!

    No, we say 1ppm loss is acceptable. Repeating the test seems like a good idea though.
    --paulr
    BBB "Intermediate Swimmer"
    IG plaster pool 18.5K gal, Hayward Pro-Grid DE filter, 3/4 HP Hydramax II; Polaris 380, 3/4 HP booster
    AG spa 325 gal, probably Sundance of some kind
    Water testing instructions on one page

  7. Back To Top    #7

    Join Date
    May 2010
    Location
    Missouri City, TX
    Posts
    9

    Re: Help please! Chlorine is gone!

    I repeated the test and came up with the same numbers: 1 ppm loss. Still a bit concerned that it went to 0 a few nights ago, but now I know to add the chlorine in the evening and keep the levels a bit higher than they were. The water is clear, though, so maybe I worry too much. Still have a lot of backswimmers, though. Ugh!

    Thanks!
    Cindy
    24,000 gunite freeform w/ pebble plaster, weeping wall, spa; Pentair Cartridge Filter; 2HP Whisperflow pumps; inline chlorinator

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