Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 5 of 5

Thread: calcium hardness

  1. Back To Top    #1

    In the Industry

    Join Date
    May 2011
    Posts
    4

    calcium hardness

    Can low calcium hardness damage a vinyl liner?

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

    Re: calcium hardness

    No. Vinyl doesn't care how low the CH level is.
    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

    Re: calcium hardness

    First post after many weeks of reading the forums and pool school, what an amazing set of DIY resources! One variable I didn't commmit to memory was CH. Unfortunately the girl at the pool store sold me on "hardness up" because "if I kept itat my current level (40ppm) it would damage the hardware." She then insisted that washing soda would lower my pH...

    Just to make sure, low CH would contribute to any mechanical failures or cause the pool to be cloudy, correct?

    We're on day 7 of modified BBB (using liquid 12.5% from the pool store because it's cheaper and they reuse containers), and we went from pond scum to seeing the shallow end 4' deep. The daily regime of holding shock while scrubbing continues, while waiting for my Taylor kit to arrive. My wife is loosing hope, as we've plateaued at a cloudy slightly green the past few days. All we have are test strips, guessing my way to keeping it over 10ppm (pool store tested our CYA at 20). Fingers crossed.
    First season with a 15 year-old vinyl 25k gallon and new Pentair SD-80 (sand) and WFE4 pump.

  4. Back To Top    #4
    JasonLion's Avatar
    Join Date
    May 2007
    Location
    Silver Spring, MD
    Posts
    37,879

    Re: calcium hardness

    Quote Originally Posted by mikewren
    Just to make sure, low CH would contribute to any mechanical failures or cause the pool to be cloudy, correct?
    Low CH levels are just fine as long as you have a vinyl liner pool and no tile work or stone work below the water line. There is no risk to the equipment and no chemistry or water feel problems. The only reason to add CH would be if you have a warranty still in effect that requires CH.
    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

  5. Back To Top    #5

    Re: calcium hardness

    Good deal, thx Jason!
    First season with a 15 year-old vinyl 25k gallon and new Pentair SD-80 (sand) and WFE4 pump.

Posting Permissions

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