Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 10 of 10

Thread: First test results - please help - very high CH

  1. Back To Top    #1

    First test results - please help - very high CH

    Hello,

    Here are first test results with the TF-100 test kit.

    Ph = 8.2 (too high, correct?)
    FC = couldn't do because I'm missing R-870 Powder.
    T/A = 110
    CH = 110*10 = 1100 (very high, right?)
    CYA = <20 (like 10)

    Pool water is looking a little cloudy and I can tell needs attention. We have a Safe-T 3 pool cover which is closed 90% of the time. This keeps the sunlight out and the temp at 80%. We moved into this house 3 weeks ago and pool was last serviced just before we moved in by their pool guy on 5/16.

    Both Ph and T/A need to be lowered based on my reading and CYA should be increased. What do I do about the very high CH?
    Thank you
    12,000G, Cartridge, IG-Plaster, Pentair easytouch 8, Intelliflo VS 3050, Intellichlor IC40, Safe-T 3 cover-pool

  2. Back To Top    #2

    Re: First test results - please help - very high CH

    I forgot to add the salt strip test.

    6.2 = 2620 ppm therefore scale tells me I need to add 75lbs of salt to reach 3000ppm. Correct?
    12,000G, Cartridge, IG-Plaster, Pentair easytouch 8, Intelliflo VS 3050, Intellichlor IC40, Safe-T 3 cover-pool

  3. Back To Top    #3
    Mod Squad Bama Rambler's Avatar
    Join Date
    Jun 2009
    Location
    SouthWest Alabama
    Posts
    22,331

    Re: First test results - please help - very high CH

    Where are you located?

    I wouldn't add anything until you verify that CH reading. If it really is 1100 you need to test your fill water and see what it is in it and if it's not very high you need to drain a lot of water to get the CH to a manageable level.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  4. Back To Top    #4

    Re: First test results - please help - very high CH

    We're in San Diego. I'll do the test again to be sure and if I get the same result then I'll take necessary action.
    12,000G, Cartridge, IG-Plaster, Pentair easytouch 8, Intelliflo VS 3050, Intellichlor IC40, Safe-T 3 cover-pool

  5. Back To Top    #5
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: First test results - please help - very high CH

    Quote Originally Posted by Ewok500
    We're in San Diego. I'll do the test again to be sure and if I get the same result then I'll take necessary action.
    Do the test with a 10 ml sample. Saves a lot of reagent.

    10 ml sample. 10 drops R-0010. 3 drops R-0011. Then count the R-0012 and multiply by 25 to get your reading. I'd start with 20 drops, and mix it for about 3 minutes, then add drops two at a time swirling for a minute at least each time. When it starts to turn purple, slow it down to one drop at a time and swirl a minute apiece.

    Unless you have a speedstir.
    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!

  6. Back To Top    #6

    Re: First test results - please help - very high CH

    looks like I just lost my reply... retyping.
    I did the test again this morning using the 10ml approach. I got a score of 950 - still very high. I then tested the fill water and got a score of 450. (we have hard water down here).
    What are my options for correcting this? and how quickly could it have reached this level. Apparently the last time the pool was serviced was only on 5/16.

    thanks!
    12,000G, Cartridge, IG-Plaster, Pentair easytouch 8, Intelliflo VS 3050, Intellichlor IC40, Safe-T 3 cover-pool

  7. Back To Top    #7

    Join Date
    Jun 2010
    Location
    Glendale, CA
    Posts
    513

    Re: First test results - please help - very high CH

    With your fill water CH level being that high you are going to really struggle with CH build up (water evaporates but the Calcium stays behind). There are a number of us in So Cal that have down spouts directed at the pool to collect rain water and pump out 4 to 6 inches of water before a big storm. I've done this the past couple seasons and it has worked out quite well.

    With no rain likely for a 6 months you might want to consider reverse osmosis. It's a little expensive - but that will give you a fresh start CH wise and with a full cover you wont be adding nearly as much high CH fill water as some of us.

    The combo of high CH, high TA and high PH is really going to reek havoc on your salt cell. You should get your PH down to 7 - 7.2 as soon as possible while you work through your options.
    16K Gal Plaster | Compupool SWG | Intelliflow VF | TF-100

  8. Back To Top    #8
    Richard320's Avatar
    Join Date
    Jan 2010
    Location
    San Dimas, CA (LA County)
    Posts
    18,768

    Re: First test results - please help - very high CH

    You're one of the lucky ones! Reverse Osmosis is available in your area. Here's how to fix it: http://www.poolservicestech.com/index.htm

    Call. He's bad about checking email. While draining and refilling may be cheaper, you'll be starting with 450....and it will just get worse through the season.
    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!

  9. Back To Top    #9

    Re: First test results - please help - very high CH

    Thanks - he can't come until Thursday this week. and I'm concerned about leaving the Ph where it is until then. Should I seek to decrease the Ph now? If yes, then with Muriatic acid?
    12,000G, Cartridge, IG-Plaster, Pentair easytouch 8, Intelliflo VS 3050, Intellichlor IC40, Safe-T 3 cover-pool

  10. Back To Top    #10

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: First test results - please help - very high CH

    Absolutely decrease your pH now. Using muriatic acid and poolcalculator.com, lower your pH to 7.2 and keep it there.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •