csi

  1. N

    Best Option to get my CSI Back Under Control

    I just installed a SWG about 2 months ago and I'm still getting used to the variations in chemistry balance. My numbers look generally in range, but the final CSI result is strongly negative (about -0.66 this last week). That seems bad to me. How bad is that? Tested just now: FC = 6.5 pH = 7.5...
  2. M

    Scale Problem

    Hey All! Great to be a part of the TFP community. Moved into my house 2 yrs ago and did the pool store hustle for the past two seasons with expected results (wasted money, effort and lots of frustration). My filter blew out late fall before a heavy freeze and had to semi winterize my pool at...
  3. M

    White flakes from SWG

    Posting new thread per @mguzzy: My csi has been within optimal range and I am getting white flakes out of my returns, as generated by SWG. Pool store states calcium hardness at about 440 or so. My fill water is about 200-250 if memory is correct. Replacing evaporation loss always adds more CA...
  4. E

    Seeking to understand the formula details that PoolMath uses to calculate CSI for a salt water pool.

    BACKGROUND: My pool: 21000 gallon in-ground gunite salt water pool, new October 2018, screened in. Hayward PL-PS4 controller, Hayward T-CELL-9 salt cell, Hayward C3030 cartridge filter, Hayward Ecostar SP3400VSP pump. Set to do a little over 2 full turnovers per day. South Florida climate...
  5. R

    Recommendations?

    Dear experts, I have a fairly new 5600 gal plaster spool with IC20 SCG. I recently purchased TF-100 kit to manage my own water and here are my numbers: Free chlorine: 4 ppm Total chlorine: 5 ppm Calcium hardness: 700 ppm (tested fill water supply and it is 50 ppm) TA: 130 CYA: 60 Salt: 4000 pH...
  6. mkmscr

    Thoughts on CSI and FC

    Curious, TFP pool app is suggesting my CSI is setting conditions for corrosion to begin with a CSI at -0.6 is that correct? My PH is about 7.6 and my TA is about 65. CH is a little low at 250. I understand PH can help adjust CSI but I generally don’t go much higher. Thoughts or am I okay...
  7. laprjns

    SWCG - Does CSI Need to be Managed

    I have and IG vinyl pool and never really paid much attention to my low CH (at least since using the TFP method) and therefore didn't manage my CSI. However this year I went all in with Inyo Pool and installed their Crystal Pure 60k SWCG along with the Purline 1.65hp VS pump. I believe that I...