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Thread: flat looking water

  1. Back To Top    #1
    aussieta's Avatar
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    Jan 2014
    Location
    Langwarrin, Victoria, Australia
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    flat looking water

    ok a bit of history on the pool, bought house december 2013
    water sparkled like a diamond, you could not look at it on a sunny day
    had water tested at two different pool stores while waiting on test kit

    17 december
    fc 1.8/0
    cc 1.6/0
    tc 3.4/0
    ph 4.8/7.4
    TA 14/33
    CH 56/61
    cya 50/29
    got pool stored to the tune of $300
    8kg bicarb, 4 kg calcium, 1kg stabilizer
    told to add whole lot when i get home with filter running, increase run time and chlorinator output
    water went cloudy and didn't improve (knowing what i know now, should not have added at same time)

    22 december
    fc 6.3
    cc 0.7
    ph 7.6
    ta 94
    ch 192
    cya 70
    told to leave filter running and cloudy would clear up and to reduce chlorinator

    3 january
    fc 3.1
    cc 1.5
    ph 7.8
    ta 110
    ch 102
    cya 46
    told to add 300 ml muriatic acid, 2kg calcium, 200grams stabilizer and increase chlorinator, water still cloudy

    10 january got taylor 2006 test kit
    fc 3.6
    cc 0.3
    ph 7.4
    ta 90
    ch 120
    cya 70
    considering the advice i was getting not as bad as i expected added another 4 kg calcium and increased chlorinator. water still cloudy

    24 january
    fc 1.6
    cc 0
    ph 7.6
    ta 90
    ch 170
    cya 80
    pool store advised 1kg sodium dichloroisocyanurate (still not sure what that is)

    25 january add 20kg salt, 1kg cal/hypo, 500g sodium dichloroisocyanurate (slamming with cal/hypo as easier) after 1 hour fc 21.5

    26 january fc 16.5 added another 1/2 kg cal/hypo

    27 january white residue on floor but water clear but not sparkling. vacuum to waste
    fc 17.5
    cc 0
    ph 7.8
    ta 90
    ch 180
    cya 70
    added 500 ml acid

    31 january perform overnight chlorine loss test with 0 loss (fc 10.5 - fc 10.5, cc 0)

    since then chlorine has ranged from minimum 8.5 to max 12. most days 11
    water appearance has not changed
    as the dog constantly drinks from pool, borates are not an option right now
    how do i get the sparkle back?
    the sodium dichloroisocyanurate and cal/hypo combo made the biggest difference
    should i repeat that
    now i think i know what i am doing i am reluctant to add anything as numbers indicate i don't have a problem but i want that sparkle back, water temps are dropping now, down to 55 farenheit

    16 may
    fc 12
    cc 0
    ph 7.6
    ta 80
    ch 210
    cya 55
    salt 3500
    temp 13 celcius/55 farenheait
    SWG inground peanut shaped eco-bright concrete pool
    50,000 litres 13,000 gallons
    Lincoln Salt Chlorinator, 25 gram cell Sand Filter with glass media
    Taylor K2006-C test kit, Taylor K-1766 salt test, Dolphin M500 pool cleaner
    are you taking care of your pool or is the poolshop taking care of you

  2. Back To Top    #2

    Join Date
    Mar 2007
    Location
    San Rafael, CA USA
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    Re: flat looking water

    You let your FC level get too low and algae started to grow making the water look cloudy. It wasn't the Dichlor or Cal-Hypo specifically, but rather raising the chlorine level to kill off the algae that made the difference. That is known as SLAMing your pool. You could have readily done that using chlorinating liquid or bleach.

    You never did properly SLAM the pool with an FC that was 40% of the CYA level, but at this point you may have a filtration issue and could consider the procedure in the Pool School article Add DE to a Sand Filter. You could also inspect the sand filter to see if there is channeling.
    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"

  3. Back To Top    #3
    aussieta's Avatar
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    Langwarrin, Victoria, Australia
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    Re: flat looking water

    wouldn't 4 months of high fc have sorted this by now
    i am convinced there is nothing growing now but i want the sparkle back
    slam again?
    SWG inground peanut shaped eco-bright concrete pool
    50,000 litres 13,000 gallons
    Lincoln Salt Chlorinator, 25 gram cell Sand Filter with glass media
    Taylor K2006-C test kit, Taylor K-1766 salt test, Dolphin M500 pool cleaner
    are you taking care of your pool or is the poolshop taking care of you

  4. Back To Top    #4

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

    Re: flat looking water

    If you truly did have the FC be consistently high, then that should slowly kill off any alage and your overnight chlorine loss test does seem to indicate it's gone. I was just commenting about how you thought the water looked better after the Dichlor and Cal-Hypo -- the FC was 17.5 after that.

    It's up to you whether you want to SLAM or not. Most likely you just need better filtration. Another alternative to DE (or cellulose fiber, but that's expensive) in the sand filter, you could try the Slime Bag, but I think the DE (or equivalent) will help a lot.
    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"

  5. Back To Top    #5
    aussieta's Avatar
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    Jan 2014
    Location
    Langwarrin, Victoria, Australia
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    Re: flat looking water

    whilst you are a lot more knowledgable than me i believe the problem was caused from adding so much bicarbonate soda and calcium chloride at the same time.
    there was no visual problem with the water until i added these and the filter was coping fine
    the problem occurred the next day
    i believe they have combined to form some other compound that is too fine for filter and is not disolving
    i am wondering what chemical to add to break down this new substance
    the cal/hypo didn't disolve it but did make it settle to the floor so i was able to vacuum the worst of it out
    SWG inground peanut shaped eco-bright concrete pool
    50,000 litres 13,000 gallons
    Lincoln Salt Chlorinator, 25 gram cell Sand Filter with glass media
    Taylor K2006-C test kit, Taylor K-1766 salt test, Dolphin M500 pool cleaner
    are you taking care of your pool or is the poolshop taking care of you

  6. Back To Top    #6

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

    Re: flat looking water

    Yes, adding those two close together can create calcium carbonate which can cloud the pool, but that should clear from filtration and also clear faster if one lowers the pH. Another pool owner had similar cloudiness but their levels of CH were much higher than yours. If the cloudiness clears up with lower pH, then that's calcium carbonate, but if it doesn't clear up over time then that indicates your filter isn't doing a very good job of clearing it.

    So you can certainly lower your pH to see if that helps to clear it up, but it won't resolve the fact that your filter isn't doing well. Maybe your CH reading isn't correct for some reason (though now you are using a good test kit).
    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"

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