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Thread: Calcium Chloride Question

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    Calcium Chloride Question

    Hello,

    Today I added about 14lbs of CH Increaser to my pool as it was originally filled with soft water testing at around 80ppm. My goal was to raise it to around 200-250. Now my concern is that since I have added the increaser I can't seem to manage my FC level. It has been dropping a few ppm about every hour it seems. Is this normal?? I had to add about 200 or so ounces of chlorine today alone in order to keep it up. I'm concerned that when I get up tomorrow morning the FC level will be at zero once again.

    Any help here would be great. Thanks.
    ____________________________________________________
    12,000 gal | IG Gunite w/ Pebble Tec | 3-5-4' depth w/ Waterfall
    Pentair IntelliFlo VS Pump, Cartridge Filter
    Manually Chlorinated
    Testing w/ ColorQ Pro 7 and K-2006

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    linen's Avatar
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    Re: Calcium Chloride Question

    For us to help, we need a full set of test results. Post FC, CC, ph, TA, CH, cya using your K-2006 test kit.

    Quote Originally Posted by kendjelic
    It has been dropping a few ppm about every hour it seems. Is this normal??
    No
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Calcium Chloride Question

    I will post results tomorrow morning. Everything was perfect since the increaser addition. Also is there a reason I shouldn't test with the ColorQ Pro? My results are almost exact to the K-2006 results. Only numbers off by only a couple ppm are the CH and CYA test, all other tests are exact.
    ____________________________________________________
    12,000 gal | IG Gunite w/ Pebble Tec | 3-5-4' depth w/ Waterfall
    Pentair IntelliFlo VS Pump, Cartridge Filter
    Manually Chlorinated
    Testing w/ ColorQ Pro 7 and K-2006

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    Charlie_R's Avatar
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    Re: Calcium Chloride Question

    Just for fun, would you be willing to post results from both?
    15'x48" 4500 gallon Intex pool, buried 1.5 ft. Pac-Fab Dynamo 3/4 hp pump. Hayward S180T sand filter, bought used. Taylor K-2006 test kit. Rocket mass heater based wood fired pool heater.

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    duraleigh's Avatar
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    Re: Calcium Chloride Question

    Back to your original question, Calcium has no effect on your pool's ability to hold chlorine.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6

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    Re: Calcium Chloride Question

    Well it looks like perhaps I may have not waited long enough to take a water sample as I took it from the inline spigot and not from the pool itself as I normally do.

    Either way, it looks like the chlorine is holding fine now.

    Here are the test results from both kits as requested from 8:30am this morning. Looks like the ColorQ is reading a bit lower than most of the K-2006 results except for CH.

    ColorQ Pro:
    FC - 8.5
    pH - 7.7
    TA - 89
    CH - 236
    CYA - 72
    CC - 0

    K-2006:
    FC - 9.5
    pH - 7.8-7.9
    TA - 100
    CH - 210
    CYA - 80
    CC - 0
    ____________________________________________________
    12,000 gal | IG Gunite w/ Pebble Tec | 3-5-4' depth w/ Waterfall
    Pentair IntelliFlo VS Pump, Cartridge Filter
    Manually Chlorinated
    Testing w/ ColorQ Pro 7 and K-2006

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    linen's Avatar
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    Re: Calcium Chloride Question

    How is your water looking? Did you happen to take a FC measurement last night after your last addition from the bulk pool water?
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

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    Re: Calcium Chloride Question

    Yeah last night at about 1am the FC came in at 10. Water looks beautiful. The attached picture was just taken looking in at the drain.
    Attached Images Attached Images
    ____________________________________________________
    12,000 gal | IG Gunite w/ Pebble Tec | 3-5-4' depth w/ Waterfall
    Pentair IntelliFlo VS Pump, Cartridge Filter
    Manually Chlorinated
    Testing w/ ColorQ Pro 7 and K-2006

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    linen's Avatar
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    Re: Calcium Chloride Question

    Quote Originally Posted by kendjelic
    Yeah last night at about 1am the FC came in at 10.
    Assuming the 10 ppm FC came from K-2006 then you it appears you have passed the OCLT and are good to go.

    Your cya is very high for a non-swg pool, so do not let your FC get below 6 ppm. If you continue to see high daily FC usage I would repeat the OCLT but this time get up near your SLAM level of 31 ppm when doing the test.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  10. Back To Top    #10

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    Re: Calcium Chloride Question

    Regarding the CYA, I drained about 12-16 inches from the pool yesterday and refilled with our hard tap water as the pool was originally filled using our water softener which was a mistake hence my adding 14lbs of hardner. My test were reading my CYA at about 100-110 consistently so was hoping to drop it some which it did although not much.

    Living in AZ, our pool is in direct sunlight daily and today the high is 103. Would lowering my CYA to about 40-50 cause a concern as I would assume that sun would eat all of my chlorine in a heartbeat.
    ____________________________________________________
    12,000 gal | IG Gunite w/ Pebble Tec | 3-5-4' depth w/ Waterfall
    Pentair IntelliFlo VS Pump, Cartridge Filter
    Manually Chlorinated
    Testing w/ ColorQ Pro 7 and K-2006

  11. Back To Top    #11
    linen's Avatar
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    Re: Calcium Chloride Question

    Yes, with an algae free pool, you would use more chlorine at 40-50 ppm cya compared to 80 ppm.. 80 ppm can and does work, but you must be vigilant. If your FC drops and you get algae, it will take much more chlorine to remove it.
    TFP Expert who uses Pool School and my TF100 test kit along with PoolMath for my: Round 11K gallon AGP with deep end, 20" sand filter, Matrix 1hp 2spd, 6 2ftX20ft solar panels (and solar cover!), Intex SWCG (copper bars disconnected) and a Rubadub hot tub (chlorine). The SLAM process is not finished until: 1. CC < 0.5 ppm, 2. An OCLT < 1.0 ppm and, 3. The water is crystal clear.

  12. Back To Top    #12

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    Re: Calcium Chloride Question

    Makes sense. I check it every night so as for now I'm on top of it. Do my other figures look ok?
    ____________________________________________________
    12,000 gal | IG Gunite w/ Pebble Tec | 3-5-4' depth w/ Waterfall
    Pentair IntelliFlo VS Pump, Cartridge Filter
    Manually Chlorinated
    Testing w/ ColorQ Pro 7 and K-2006

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