Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 2 of 2

Thread: Nitrate too high, do i really have to refill the pool???

  1. Back To Top    #1

    Nitrate too high, do i really have to refill the pool???

    Just got the pool opened up recently.
    Got our Chlorine up. Went to the store for a full test.
    They said our Nitrate was too high (29ppm), and we needed to dump/refill the pool by 1/2 or 1/3.

    I don't think we had this issue last year.
    We did use Phos-Free a few times last year to clean the pool.
    To start off this year, we only added a little water from our well.
    And we didn't do any kind of "Spring-Startup" kits or anything.
    I don't know why it's done this. There is a nearby farm, but it's always been there.

    Do we need to dump 1/2 or 1/3 of the water? Sounds kinda crazy.
    We have the test-kit recommended from the site here, but it doesn't include Nitrate.

    Here's what our "In-Store" test showed:

    Free Chlorine: 2.7 ppm
    Total Chlorine: 3.0 ppm
    Combined Chlorine: 0.3 ppm
    pH: 7.5
    Hardness: 300 ppm
    Alk: 56 ppm
    CYA: 15 ppm
    Copper: 0.1 ppm
    Iron: 0 ppm
    Nitrate: 29 ppm

    Is this something serious? Do we need to dump/refresh our water?
    I'm pretty freaked out. I would appreciate any advice.
    Setup in 2007
    30,000 Gallon Rectangle
    Sand Filter & Polaris 360

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

    Re: Nitrate too high, do i really have to refill the pool???

    If you can maintain a reasonable FC level, without constantly losing all your FC, then there is nothing to worry about and no need to do anything. Your CYA level is fairly low, so I would expect you to lose a lot of FC during the day. The important question is if you lose FC overnight. If FC remains steady overnight then you don't need to replace any water.
    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

Posting Permissions

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