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

Thread: No change in levels.

  1. Back To Top    #1

    Join Date
    May 2009
    Location
    Florida
    Posts
    45

    No change in levels.

    I added 5 cups of calcium granular yesterday to increase CH from 275 to 300. Today it's still measuring at 275. Should I wait to restest again or add more?

    Had same problem with CYA. Added granular stabilizer last week and still no change as of today?

    FC 7
    CC 0
    PH 7.6
    TA 90
    CH 275
    CYA 50
    SALT 3900
    BORATES 50
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

  2. Back To Top    #2
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: No change in levels.

    5 cups of calcium would have increased the CH level by about 15, which could easily fail to show up on the test when you are testing by multiples of 25.

    If you made a similarly small change to the CYA level it is just as likely not to show up.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  3. Back To Top    #3
    Guest

    Re: No change in levels.

    Precision of the CH test is either +/- 10 ppm or +/- 25 ppm depending on the sample. That means for a 25 ml sample your test results could vary by as much as 20 ppm and still be 'within spec' and for a 10 ml sample the variance is 50 ppm! Raising your CH from 275 to 300 ppm will not have any real effect on your pool in real world conditions. I would not worry about making changes in CH unless they were 50 ppm or greater (unless you are right on the boarder of the recommended levels, then I would say to get yourself in the middoe of the range.) If you look at this chart of recommended leves you will see that the smallest range we give for CH is 100 ppm. Small changes are not going to have any effect.
    pool-school/recommended_levels

    How much were you trying to move the CYA? If it was 20 pm or less it is very possible that you would not see it on testing. My recommendation would be to bring your CYA up to 80 ppm.

    I've said it before and I will say it again. It is not necessary (nor is it even desirable) to micromanage a pool. KISS!

  4. Back To Top    #4

    Join Date
    May 2009
    Location
    Florida
    Posts
    45

    No change in levels.

    I'm attempting to raise CYA from 50 to 80. Added stabilizer today and will retest next week.
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

  5. Back To Top    #5
    Guest

    Re: No change in levels.

    Quote Originally Posted by kenny
    I'm attempting to raise CYA from 50 to 80. Added stabilizer today and will retest next week.

  6. Back To Top    #6

    Join Date
    May 2009
    Location
    Florida
    Posts
    45

    Re: No change in levels.

    I don't get it. On top of the initial 5 cups, I added the rest of the bottle which was a total of 5 lbs. of Calcium and my CH is STILL testing at 275. Why is it not moving? I'm just dumping the granular into the skimmer.
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

  7. Back To Top    #7
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: No change in levels.

    What test kit are you using?
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  8. Back To Top    #8

    Join Date
    May 2009
    Location
    Florida
    Posts
    45

    Re: No change in levels.

    Taylor FAS-DPD test kit. When I do the test, the R-0011L drops seem to come out smaller than the other reagents. Is that normal as well?
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

  9. Back To Top    #9
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: No change in levels.

    Try wiping the dropper tip with a damp tissue at first and every couple of drops and see if that makes any difference.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

  10. Back To Top    #10

    Join Date
    May 2009
    Location
    Florida
    Posts
    45

    Re: No change in levels.

    I think I found the problem. The drops from the R-0011L appeared to come out smaller and a bit thick. I shook the bottle up first and then put the 3 drops in and the test showed CH at 325.
    14,275 gallon inground ~ Pentair Cartridge cc200 ~ Pebbletec Tahoe Blue ~ SWG Intellichlor IC40 ~ Pentair Whisper 2hp ~ Taylor FAS-DPD Test Kit

Posting Permissions

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