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

Thread: Question on CYA and Calcium Hardness

  1. Back To Top    #1

    Join Date
    Sep 2015
    York pa

    Question on CYA and Calcium Hardness

    Will the CYA or Calcium Hardness level ever go down naturally? Is replacing the water the only way to achieve that goal?
    25K, IG vinyl, sand filter, 10 yrs old, TF100 test kit, elec htr

  2. Back To Top    #2
    Mod Squad tim5055's Avatar
    Join Date
    May 2014
    Columbia, SC

    Re: Question on CYA and Calcium Hardness

    CYA naturally degrades very slowly, maybe 1-2ppm per month.

    Calcium is a mineral and it just sticks around.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

Posting Permissions

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