cya level

  1. K

    New pool owner, super high CYA... what to do during off season?

    Hello, Been a lurker for a month! I live in Arizona, and recently bought a house with a pool. The water in the pool seemed ok, but consistently tested high in chlorine and just below "ideal" in pH... after reading here I assumed the CYA was high. After having it tested at a local pool place...
  2. eagle47

    Runaway CYA?

    After being near rock-solid stable all summer, my latest CYA readings are increasing dramatically: 8/21: 35 8/22: 35 8/23: 40 8/24: 45 8/25: 45 8/26: 50 8/27: 60 What could be the cause? The only chemical additions I've made during this time are a half-gallon of LC every night as per my usual...
  3. R

    Zero Chlorine

    Hey all, found this site as a result of googling the issues I've had a with a new (to me) pool. I have absolutely no idea what I'm doing regarding pool stuff, but I recently read through pool school and am trying to get started on the TFP method. Grateful for any help you guys can give me...
  4. sadohert

    Interpreting my CYA Level - How much does that black dot really disappear?

    TFP Friends - I think the key question I have here is whether my black dot has disappeared (see picture below)... I have other sub-questions I would love to hear feedback on. If that dot has disappeared, then I'd say my CYA is around 40, which I believe is too low and might explain how much...
  5. S

    CYA levels in 3 month old pool

    New Plaster pool. First season. I use trichloride tabs in a chlorinator. My Cl levels were way high at first. Got a Taylor Test kit and now have that under control. Recently tested the CYA level and was 80. I know it’s in the high level, but Is it that high? Is it possible I got it that high in...