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

Thread: Water added, CYA reduced?

  1. Back To Top    #1

    Join Date
    Apr 2017
    Location
    Hillsborough New Jersey
    Posts
    30

    Water added, CYA reduced?

    When I opened my pool I added about 18" of water to it. I guess that's not enough to drop my cya.

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Location
    Franklin, NC
    Posts
    9,892

    Re: Water added, CYA reduced?

    Quote Originally Posted by Splitshot View Post
    When I opened my pool I added about 18" of water to it. I guess that's not enough to drop my cya.
    The answer is, it depends.....

    Where did the water go that you replaced? If you pumped it out in the fall for winterization, then yes - your CYA did go down. HBow much only testing will determine.

    But, if water is replaced because of evaporation then no, the CYA does not go down. When water evaporates it leaved behind the "stuff" in the water and only pure water goes away. Evaporation does not help with reductions of things like CYA, Iron, Copper or CH (calcium).
    TFP Moderator

    Trouble Free Pool is a free resource. The people who answer questions are volunteers. If you find the site to be a good resource, please consider making a donation to help support the site. Thanks.

    Support the site

Posting Permissions

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