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Thread: High CH here also

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    High CH here also

    I was hoping to glean enough information from posts from other users to help myself without bothering any of you with my question, but I needed to clarify something. My problem is high CH. Did I read correctly that shocking will lower CH?

    I've had a low salt reading on my SWG even though salt level is fine. Intex has finally helped me there and it is running well. FC number is a little higher than I usually keep it, but with no SWG for a couple of weeks I've been adding liquid chlorine and things have not been as consistent.

    I did some testing today with the following results:

    FC 11
    CC .5
    TC 11.5
    CYA 100
    TA 90
    pH 7.2
    CH 420

    I have recently drained a significant amount of water and added hose water back due to the SWG malfunction. I believed it at first and added too much salt according to the salt strips that finally arrived. I am assuming that is why the CH is so high. How do I lower this?

    I decided not to close my pool, so I will just be sure that my pump is running from about 2AM to 6 AM daily in the event of a freeze - which really only happens maybe once or twice in our mild winters. Does that sound reasonable?

    Thank you.
    Intex 20'x10'x52" 5,835 gallon above ground; vinyl; Intex 2,650-Gallon Sand Filter Pump; Intex Krystal Clear Saltwater System Model CS8110.

  2. Back To Top    #2

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

    Re: High CH here also

    Quote Originally Posted by imcj
    My problem is high CH. Did I read correctly that shocking will lower CH?
    :
    I have recently drained a significant amount of water and added hose water back due to the SWG malfunction. I believed it at first and added too much salt according to the salt strips that finally arrived. I am assuming that is why the CH is so high. How do I lower this?
    :
    I decided not to close my pool, so I will just be sure that my pump is running from about 2AM to 6 AM daily in the event of a freeze - which really only happens maybe once or twice in our mild winters. Does that sound reasonable?
    Shocking will not lower CH. You can only lower CH by water dilution using fill water that is lower in CH than the pool water (or you can use Reverse Osmosis to remove CH and most everything else in the water).

    Your fill water may be high in CH so you should test it. Evaporation and refill increases CH over time.

    Salt does not increase CH (unless the "salt" is calcium chloride -- normally when one refers to "salt" they are referring to sodium chloride). So adding salt for your SWG did not increase the CH.

    As for pump running to prevent a freeze, it sounds very reasonable though you have to consider what would happen if you were to have a power outage. Since you have mild winters, the risk sounds pretty low -- similar to where we live where it only gets below freezing a few nights in the winter and even then it's not much below freezing. I don't even run the pump at night as the temp in the pumphouse stays a bit warmer and the pipes underground are kept warmer by the ground (i.e. there are no pipes exposed to the cold air directly). I do, however, have my solar system drained completely.
    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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    Guest

    Re: High CH here also

    IMCJ, where are you from?

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    Re: High CH here also

    Thank you for the reply. I am from the desert in Southern CA, about 30 minutes from the Mexico border. Most people familiar with the desert area know the Glamis Sand Dunes. I am about 30 minutes from there as well as the Superstition mountains.
    Intex 20'x10'x52" 5,835 gallon above ground; vinyl; Intex 2,650-Gallon Sand Filter Pump; Intex Krystal Clear Saltwater System Model CS8110.

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    Guest

    Re: High CH here also

    How far from El Centro?

  6. Back To Top    #6

    Re: High CH here also

    Hey, you know my area...about 14 miles.
    Intex 20'x10'x52" 5,835 gallon above ground; vinyl; Intex 2,650-Gallon Sand Filter Pump; Intex Krystal Clear Saltwater System Model CS8110.

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    dmanb2b's Avatar
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    Apr 2009
    Location
    NY
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    3,728

    Re: High CH here also

    I'll let Sal answer...but you seem like a perfect candidate for reverse osmosis treatment...a service that Sal and Bruce provide and has helped many where water is less abundant
    24'x52" AGP (13,500 Gallons), Intex SWG, (2)Solar Bear 4x20 panels, Hayward S220T Filter, 1/2hp Pentair Superflo

    Pool School, TFTestKits, Pool Calculator

  8. Back To Top    #8
    Guest

    Re: High CH here also

    I spend a lot of time in El Centro for my day job! As for R/O, CH is still within limits, CYA is high, but manageable. If you are using chlorine tabs, STOP and switch to liquid. Also, no need to shut down your pool, what you are doing is fine!

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    Richard320's Avatar
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    San Dimas, CA (LA County)
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    18,768

    Re: High CH here also

    420 is pretty good if you ask me! I checked my fill water the other day, it's 330 this week.
    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!

  10. Back To Top    #10

    Re: High CH here also

    Wow, you can't even imagine how much better I feel. My TF-100 instructions say that 200-300 is ideal, so I just assumed 420 was out of the ballpark. If you don't mind another question - for my own future reference, how high is considered acceptable? Truly, thank you all very much for your responses - I feel like I'm doing okay now. This site is the only reason I have any clue what I'm doing.

    BTW - Do you spend much time here in our July-August weather? Yikes! Everybody tries to get out of here then!
    Intex 20'x10'x52" 5,835 gallon above ground; vinyl; Intex 2,650-Gallon Sand Filter Pump; Intex Krystal Clear Saltwater System Model CS8110.

  11. Back To Top    #11
    Guest

    Re: High CH here also

    Yup, I have spent very hot days in a hay shed with hydraulics and temps are somewhere around 120 -130 F. Not fun!

  12. Back To Top    #12
    Richard320's Avatar
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    Posts
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    Re: High CH here also

    Quote Originally Posted by imcj
    Wow, you can't even imagine how much better I feel. My TF-100 instructions say that 200-300 is ideal, so I just assumed 420 was out of the ballpark. If you don't mind another question - for my own future reference, how high is considered acceptable? Truly, thank you all very much for your responses - I feel like I'm doing okay now. This site is the only reason I have any clue what I'm doing.
    Use the Pool Calculator. Plug in all the numbers and it will tell you CSI. There will come a point when you don't have much wiggle room with pH and TA to keep it near zero; that's when you worry. Currently my pool is close to 1000 again. I'll pump some out and drown the lawn if needed. I'm hoping for a lot of rainwater dilution this year.
    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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