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Thread: Can too much FC be a problem?

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    Can too much FC be a problem?

    So I've had a bit of an algae issue opening up my pool this year. I cranked up my SWG tp 100% and added couple bottles of 10% chlorine (I tried 1 and it wasn't enough). It seems to be starting to work as the pool went from green to cloudy. At first I thought I was done but apparently I'm not. I'm currently ordering a TF100 kit to get accurate chlorine reading, but it's going to take a bit to arrive. At the moment all I can tell from the test strips I have that my FC is well over 10 (changes more or less instantly to the darkest colour).

    So my question: Is there any danger leaving the pool at an indeterminate high chlorine level until with A) the algae is gone, or B) by test kit arrives and I can see where i'm exactly at?

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    Richard320's Avatar
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    Re: Can too much FC be a problem?

    You could bleach your liner if it's a vinyl pool.

    "Colour"? Are you from Canada? You won't be able to get a TF100 there. This place has the monopoly on Taylor test products and charges accordingly.

    If you dilute your test sample 50-50 with nonchlorinated bottled water, you might be able to get a reading and double it for an estimate of where you are.

    How high you should go depends entirely on the CYA levels, as seen here.

    It will help us a lot of you post your equipment and location. Directions here.
    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!

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    Re: Can too much FC be a problem?

    [QUOTE=Richard320;658788]You could bleach your liner if it's a vinyl pool.

    Ya I thought there might be something like that

    Quote Originally Posted by Richard320 View Post
    "Colour"? Are you from Canada? You won't be able to get a TF100 there. This place has the monopoly on Taylor test products and charges accordingly.
    Yep saw that too. The prices they charge are almost criminal. It easily costs over double what it does in the US. I was planning on using a service like http://myusaddress.ca/, but it's looking like it might take even longer to get here than I had thought so I may just have to pay the high prices.

    Quote Originally Posted by Richard320 View Post
    If you dilute your test sample 50-50 with nonchlorinated bottled water, you might be able to get a reading and double it for an estimate of where you are.
    That's genius! I'll do that to make sure I don't go crazy high.

    Quote Originally Posted by Richard320 View Post
    How high you should go depends entirely on the CYA levels, as seen here.

    It will help us a lot of you post your equipment and location. Directions here.
    And ya I would have added more info, but based on how rough my readings are I didn't know how useful it would be. I more or less just wanted to know if I was going to break something bad in the short term. Then when I got better info I'd be able to post it.

    Right now my CYA is 50 +/- 20 (ya I know not very accurate) so I'm looking for a FC shock value of around 20.

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    Re: Can too much FC be a problem?

    And my sig should be updated now to

    - - - Updated - - -

    Quote Originally Posted by da_guy2 View Post
    And my sig should be updated now to
    Wait sorry NOW it's updated.

    - - - Updated - - -

    Hold on a sec.... How's that?
    27' AG Round (~17000 Gallons or 64000 L)
    Hayward 1.5 HP Power Flo Matrix Pump (2 speed usually run 6hrs high 18hrs low)
    Hayward CC150CAN XStream Cartridge Filter (150 ft^2 120 GPM)
    Hayward AquaTrol SWG
    Installed April 2012

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    Richard320's Avatar
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    Re: Can too much FC be a problem?

    Now we see it.

    You have two options for a decent test kit. Pay handsomely in Canuckistan, or make a run for the border. Call ahead, first, though. Very few stores stock a FAS-DPD test kit. They'll sell you a DPD test kit and tell you it's the same, but it's not.
    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!

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    Mod Squad tim5055's Avatar
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    Re: Can too much FC be a problem?

    Got a friend south of the border where you can ship a test kit to and go pick it up? But factoring in travel costs it may be more expensive that way.

    Will Amazon ship a K2006 north of the border?
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: Can too much FC be a problem?

    No amazon doesn't. I found a couple eBay stores that say they will, but it might be a mistake. I think I may just pay the high price this time and when I need a refill on reagents I'll find a cheaper way.

    Oh and I did the dilution test and it came out to be somewhere just over 10 but not near 20 yet. good to know I'm not in the "way too high" zone, but irritating that I'm not in the shock zone yet. I think I may just wait for the test kit before doing much more as I don't want to make a mistake.
    27' AG Round (~17000 Gallons or 64000 L)
    Hayward 1.5 HP Power Flo Matrix Pump (2 speed usually run 6hrs high 18hrs low)
    Hayward CC150CAN XStream Cartridge Filter (150 ft^2 120 GPM)
    Hayward AquaTrol SWG
    Installed April 2012

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    Re: Can too much FC be a problem?

    So sure enough the test kit arrives just as the pool clears up. Figures.

    Anyways I tested and here are my values:

    FC 16.5
    CC .5
    pH 7.6
    TA 110
    CH 160
    CYA 60

    So I never made it up to a proper shock value (24), but I guess 16.5 was enough? Anyways, I've turned off my SWG and I'll see what my FC is in the morning. If it doesn't drop then I'll assume I'm good. If it does I'll bring it back up to a proper shock value and try again.
    27' AG Round (~17000 Gallons or 64000 L)
    Hayward 1.5 HP Power Flo Matrix Pump (2 speed usually run 6hrs high 18hrs low)
    Hayward CC150CAN XStream Cartridge Filter (150 ft^2 120 GPM)
    Hayward AquaTrol SWG
    Installed April 2012

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